Reland: Update TextSelection for non-user initiated events

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 095c8cabe17ac50500deccdce280133aced3a93e..676a4297f1534f4db9ff0c6bfd2ad1879869da10 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -1473,10 +1473,11 @@ IPC_MESSAGE_ROUTED1(FrameHostMsg_ContextMenu, content::ContextMenuParams)
 // Notification that the text selection has changed.
 // Note: The second parameter is the character based offset of the
 // base::string16 text in the document.
-IPC_MESSAGE_ROUTED3(FrameHostMsg_SelectionChanged,
+IPC_MESSAGE_ROUTED4(FrameHostMsg_SelectionChanged,
                     base::string16 /* text covers the selection range */,
                     uint32_t /* the offset of the text in the document */,
-                    gfx::Range /* selection range in the document */)
+                    gfx::Range /* selection range in the document */,
+                    bool /* selection is triggered by user input */)
 
 // Response for FrameMsg_JavaScriptExecuteRequest, sent when a reply was
 // requested. The ID is the parameter supplied to