Reland: Update TextSelection for non-user initiated events

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 351489a51a9fc886da0ac111063991e764b54451..c0260197cfaae8cd39b952d86f200150a24b1b7e 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -324,6 +324,12 @@ class CONTENT_EXPORT RenderFrameImpl
   // Called when the widget receives a mouse event.
   void RenderWidgetWillHandleMouseEvent();
 
+  // Notifies the browser of text selection changes made.
+  void SetSelectedText(const base::string16& selection_text,
+                       size_t offset,
+                       const gfx::Range& range,
+                       bool user_initiated);
+
 #if BUILDFLAG(ENABLE_PLUGINS)
   // Get/set the plugin which will be used to handle document find requests.
   void set_plugin_find_handler(PepperPluginInstanceImpl* plugin) {
@@ -449,9 +455,6 @@ class CONTENT_EXPORT RenderFrameImpl
   bool IsFTPDirectoryListing() override;
   void AttachGuest(int element_instance_id) override;
   void DetachGuest(int element_instance_id) override;
-  void SetSelectedText(const base::string16& selection_text,
-                       size_t offset,
-                       const gfx::Range& range) override;
   void EnsureMojoBuiltinsAreAvailable(v8::Isolate* isolate,
                                       v8::Local<v8::Context> context) override;
   void AddMessageToConsole(ConsoleMessageLevel level,
@@ -764,7 +767,7 @@ class CONTENT_EXPORT RenderFrameImpl
   // it has changed.
   // TODO(varunjain): delete this method once we figure out how to keep
   // selection handles in sync with the webpage.
-  void SyncSelectionIfRequired();
+  void SyncSelectionIfRequired(bool user_initiated);
 
  protected:
   explicit RenderFrameImpl(const CreateParams& params);