Add a mojo channel for frame messages.

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 0b981590a3b35afe89923905e99eb534d7edb46a..dd6a5ac5e9a58dbe8d253874e0164a2b54dda68a 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -732,6 +732,12 @@ class CONTENT_EXPORT RenderFrameImpl
   bool ScheduleFileChooser(const FileChooserParams& params,
                            blink::WebFileChooserCompletion* completion);
 
+  bool handling_select_range() const { return handling_select_range_; }
+
+  void set_is_pasting(bool value) { is_pasting_ = value; }
+
+  void set_handling_select_range(bool value) { handling_select_range_ = value; }
+
   // Plugin-related functions --------------------------------------------------
 
 #if BUILDFLAG(ENABLE_PLUGINS)
@@ -761,6 +767,10 @@ class CONTENT_EXPORT RenderFrameImpl
   void OnSetPepperVolume(int32_t pp_instance, double volume);
 #endif  // ENABLE_PLUGINS
 
+#if defined(OS_MACOSX)
+  void OnCopyToFindPboard();
+#endif
+
  protected:
   explicit RenderFrameImpl(const CreateParams& params);
 
@@ -956,10 +966,6 @@ class CONTENT_EXPORT RenderFrameImpl
 #endif
 #endif
 
-#if defined(OS_MACOSX)
-  void OnCopyToFindPboard();
-#endif
-
   // Callback scheduled from OnSerializeAsMHTML for when writing serialized
   // MHTML to file has been completed in the file thread.
   void OnWriteMHTMLToDiskComplete(