diff --git a/autobuild.xml b/autobuild.xml
index 5f072512c1822073e92618f18d5b459c41cbf060..88900a4f29d1315e32b737042a292bab90043630 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -580,9 +580,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>23aeaf23e7db2484a1850017141860dd</string>
+              <string>c3c10098d8c9c86bd3392c3441591554</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/34069/283470/dullahan-1.1.1320_3.3626.1895.g7001d56-darwin64-525361.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/38807/327515/dullahan-1.1.2200_74.1.19_gb62bacf_chromium-74.0.3729.157-darwin64-527989.tar.bz2</string>
             </map>
             <key>name</key>
             <string>darwin64</string>
@@ -592,9 +592,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>71fa66203326aca918796e874976c080</string>
+              <string>f8a1da6f464b3a19d2e087525ab97855</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/34070/283477/dullahan-1.1.1320_3.3626.1895.g7001d56-windows-525361.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/38808/327521/dullahan-1.1.2200_74.1.19_gb62bacf_chromium-74.0.3729.157-windows-527989.tar.bz2</string>
             </map>
             <key>name</key>
             <string>windows</string>
@@ -604,16 +604,16 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>c7162e4805f50a3609f5dc63d0cf2bc0</string>
+              <string>bd481e6adfe1280fef7d9f840133421e</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/34071/283480/dullahan-1.1.1320_3.3626.1895.g7001d56-windows64-525361.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/ct2/38809/327525/dullahan-1.1.2200_74.1.19_gb62bacf_chromium-74.0.3729.157-windows64-527989.tar.bz2</string>
             </map>
             <key>name</key>
             <string>windows64</string>
           </map>
         </map>
         <key>version</key>
-        <string>1.1.1320_3.3626.1895.g7001d56</string>
+        <string>1.1.2200_74.1.19_gb62bacf_chromium-74.0.3729.157</string>
       </map>
       <key>elfio</key>
       <map>
diff --git a/indra/llplugin/llpluginclassmedia.cpp b/indra/llplugin/llpluginclassmedia.cpp
index 9d447b0f373e10772a7034bfd8b628c9ef0cb109..cdf2ddde6cc89d1b8d9ead3081a00f648aa083b4 100644
--- a/indra/llplugin/llpluginclassmedia.cpp
+++ b/indra/llplugin/llpluginclassmedia.cpp
@@ -656,12 +656,14 @@ bool LLPluginClassMedia::keyEvent(EKeyEventType type, int key_code, MASK modifie
 	return result;
 }
 
-void LLPluginClassMedia::scrollEvent(int x, int y, MASK modifiers)
+void LLPluginClassMedia::scrollEvent(int x, int y, int clicks_x, int clicks_y, MASK modifiers)
 {
 	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "scroll_event");
 
 	message.setValueS32("x", x);
 	message.setValueS32("y", y);
+	message.setValueS32("clicks_x", clicks_x);
+	message.setValueS32("clicks_y", clicks_y);
 	message.setValue("modifiers", translateModifiers(modifiers));
 
 	sendMessage(message);
diff --git a/indra/llplugin/llpluginclassmedia.h b/indra/llplugin/llpluginclassmedia.h
index 4f52afb31741dd72712014b0c8522b8a277b6f8c..9d11ee0421d92f4b2efdaa28a8f800195be9aaa4 100644
--- a/indra/llplugin/llpluginclassmedia.h
+++ b/indra/llplugin/llpluginclassmedia.h
@@ -118,7 +118,7 @@ class LLPluginClassMedia : public LLPluginProcessParentOwner
 	
 	bool keyEvent(EKeyEventType type, int key_code, MASK modifiers, LLSD native_key_data);
 
-	void scrollEvent(int x, int y, MASK modifiers);
+	void scrollEvent(int x, int y, int clicks_x, int clicks_y, MASK modifiers);
 
 	// enable/disable media plugin debugging messages and info spam
 	void enableMediaPluginDebugging( bool enable );
diff --git a/indra/media_plugins/cef/media_plugin_cef.cpp b/indra/media_plugins/cef/media_plugin_cef.cpp
index 66b316df90ef72b3f17ff91a8a3c7576b64beac2..40b480a84e91df835345d09ad5bb9554f675341b 100644
--- a/indra/media_plugins/cef/media_plugin_cef.cpp
+++ b/indra/media_plugins/cef/media_plugin_cef.cpp
@@ -652,10 +652,13 @@ void MediaPluginCEF::receiveMessage(const char* message_string)
 			{
 				S32 x = message_in.getValueS32("x");
 				S32 y = message_in.getValueS32("y");
+				S32 delta_x = message_in.getValueS32("clicks_x");
+				S32 delta_y = message_in.getValueS32("clicks_y");
 				const int scaling_factor = 40;
-				y *= -scaling_factor;
+				delta_x *= -scaling_factor;
+				delta_y *= -scaling_factor;
 
-				mCEFLib->mouseWheel(x, y);
+				mCEFLib->mouseWheel(x, y, delta_x, delta_y);
 			}
 			else if (message_name == "text_event")
 			{
diff --git a/indra/newview/llmediactrl.cpp b/indra/newview/llmediactrl.cpp
index 7f6955d08cccaff5953c418da15d45237de5e4da..1d3a026049d0a5fb2d56e2103b4adf0974cf32ee 100644
--- a/indra/newview/llmediactrl.cpp
+++ b/indra/newview/llmediactrl.cpp
@@ -202,7 +202,10 @@ BOOL LLMediaCtrl::handleScrollWheel( S32 x, S32 y, S32 clicks )
 {
 	if (LLPanel::handleScrollWheel(x, y, clicks)) return TRUE;
 	if (mMediaSource && mMediaSource->hasMedia())
-		mMediaSource->getMediaPlugin()->scrollEvent(0, clicks, gKeyboard->currentMask(TRUE));
+	{
+		convertInputCoords(x, y);
+		mMediaSource->scrollWheel(x, y, 0, clicks, gKeyboard->currentMask(TRUE));
+	}
 
 	return TRUE;
 }
diff --git a/indra/newview/llpanelprimmediacontrols.cpp b/indra/newview/llpanelprimmediacontrols.cpp
index 5f413fc3c0d64c1f25c44ca7cbb0bb434bb9a145..c74c2e0fd8bf7abc7a2120c2e0a33453ae61d2cc 100644
--- a/indra/newview/llpanelprimmediacontrols.cpp
+++ b/indra/newview/llpanelprimmediacontrols.cpp
@@ -547,17 +547,17 @@ void LLPanelPrimMediaControls::updateShape()
 			switch (mScrollState) 
 			{
 				case SCROLL_UP:
-					media_impl->scrollWheel(0, -1, MASK_NONE);
+					media_impl->scrollWheel(0, 0, 0, -1, MASK_NONE);
 					break;
 				case SCROLL_DOWN:
-					media_impl->scrollWheel(0, 1, MASK_NONE);
+					media_impl->scrollWheel(0, 0, 0, 1, MASK_NONE);
 					break;
 				case SCROLL_LEFT:
-					media_impl->scrollWheel(1, 0, MASK_NONE);
+					media_impl->scrollWheel(0, 0, 1, 0, MASK_NONE);
 					//				media_impl->handleKeyHere(KEY_LEFT, MASK_NONE);
 					break;
 				case SCROLL_RIGHT:
-					media_impl->scrollWheel(-1, 0, MASK_NONE);
+					media_impl->scrollWheel(0, 0, -1, 0, MASK_NONE);
 					//				media_impl->handleKeyHere(KEY_RIGHT, MASK_NONE);
 					break;
 				case SCROLL_NONE:
@@ -1134,7 +1134,7 @@ void LLPanelPrimMediaControls::onScrollUp(void* user_data)
 	
 	if(impl)
 	{
-		impl->scrollWheel(0, -1, MASK_NONE);
+		impl->scrollWheel(0, 0, 0, -1, MASK_NONE);
 	}
 }
 void LLPanelPrimMediaControls::onScrollUpHeld(void* user_data)
@@ -1151,7 +1151,7 @@ void LLPanelPrimMediaControls::onScrollRight(void* user_data)
 
 	if(impl)
 	{
-		impl->scrollWheel(-1, 0, MASK_NONE);
+		impl->scrollWheel(0, 0, -1, 0, MASK_NONE);
 //		impl->handleKeyHere(KEY_RIGHT, MASK_NONE);
 	}
 }
@@ -1170,7 +1170,7 @@ void LLPanelPrimMediaControls::onScrollLeft(void* user_data)
 
 	if(impl)
 	{
-		impl->scrollWheel(1, 0, MASK_NONE);
+		impl->scrollWheel(0, 0, 1, 0, MASK_NONE);
 //		impl->handleKeyHere(KEY_LEFT, MASK_NONE);
 	}
 }
@@ -1189,7 +1189,7 @@ void LLPanelPrimMediaControls::onScrollDown(void* user_data)
 	
 	if(impl)
 	{
-		impl->scrollWheel(0, 1, MASK_NONE);
+		impl->scrollWheel(0, 0, 0, 1, MASK_NONE);
 	}
 }
 void LLPanelPrimMediaControls::onScrollDownHeld(void* user_data)
diff --git a/indra/newview/llviewermedia.cpp b/indra/newview/llviewermedia.cpp
index d8745b1ecaa3a900707956627755ffa0ad64211b..faad6bdb8276e70ff24cb4f757916d7fab3f510c 100644
--- a/indra/newview/llviewermedia.cpp
+++ b/indra/newview/llviewermedia.cpp
@@ -2322,14 +2322,14 @@ void LLViewerMediaImpl::mouseDoubleClick(S32 x, S32 y, MASK mask, S32 button)
 }
 
 //////////////////////////////////////////////////////////////////////////////////////////
-void LLViewerMediaImpl::scrollWheel(S32 x, S32 y, MASK mask)
+void LLViewerMediaImpl::scrollWheel(S32 x, S32 y, S32 scroll_x, S32 scroll_y, MASK mask)
 {
 	scaleMouse(&x, &y);
 	mLastMouseX = x;
 	mLastMouseY = y;
 	if (mMediaSource)
 	{
-		mMediaSource->scrollEvent(x, y, mask);
+		mMediaSource->scrollEvent(x, y, scroll_x, scroll_y, mask);
 	}
 }
 
diff --git a/indra/newview/llviewermedia.h b/indra/newview/llviewermedia.h
index e2e758befb6df2a59946f55cae1671100075c6b3..bea024e95233bf3f8e7b822ce9e63c029be23956 100644
--- a/indra/newview/llviewermedia.h
+++ b/indra/newview/llviewermedia.h
@@ -230,7 +230,7 @@ class LLViewerMediaImpl
 	void mouseMove(const LLVector2& texture_coords, MASK mask);
     void mouseDoubleClick(const LLVector2& texture_coords, MASK mask);
     void mouseDoubleClick(S32 x, S32 y, MASK mask, S32 button = 0);
-	void scrollWheel(S32 x, S32 y, MASK mask);
+	void scrollWheel(S32 x, S32 y, S32 scroll_x, S32 scroll_y, MASK mask);
 	void mouseCapture();
 	
 	void navigateBack();
diff --git a/indra/newview/llviewermediafocus.cpp b/indra/newview/llviewermediafocus.cpp
index 59165c1d7144d2e005fa6a73337f2b52f7237905..b86d678196239ea784b15ba92ca7c77f8db7b886 100644
--- a/indra/newview/llviewermediafocus.cpp
+++ b/indra/newview/llviewermediafocus.cpp
@@ -377,12 +377,7 @@ BOOL LLViewerMediaFocus::handleScrollWheel(S32 x, S32 y, S32 clicks)
 	LLViewerMediaImpl* media_impl = getFocusedMediaImpl();
 	if(media_impl && media_impl->hasMedia())
 	{
-        // the scrollEvent() API's x and y are not the same as handleScrollWheel's x and y.
-        // The latter is the position of the mouse at the time of the event
-        // The former is the 'scroll amount' in x and y, respectively.
-        // All we have for 'scroll amount' here is 'clicks'.
-		// We're also not passed the keyboard modifier mask, but we can get that from gKeyboard.
-		media_impl->getMediaPlugin()->scrollEvent(0, clicks, gKeyboard->currentMask(TRUE));
+		media_impl->scrollWheel(x, y, 0, clicks, gKeyboard->currentMask(TRUE));
 		retval = TRUE;
 	}
 	return retval;