Add a mojo channel for frame messages.

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index 4114d6535131c6b5b97f4c115020c1b58ea88c4e..d0b48e4298f58fc333b99e3d1746940922c4ce85 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -890,8 +890,8 @@ void BrowserPluginGuest::OnExecuteEditCommand(int browser_plugin_instance_id,
   if (!focused_frame)
     return;
 
-  focused_frame->Send(new InputMsg_ExecuteNoValueEditCommand(
-      focused_frame->GetRoutingID(), name));
+  focused_frame->GetFrameInputHandler()->ExecuteEditCommand(name,
+                                                            base::nullopt);
 }
 
 void BrowserPluginGuest::OnImeSetComposition(
@@ -923,7 +923,7 @@ void BrowserPluginGuest::OnExtendSelectionAndDelete(
   RenderFrameHostImpl* rfh = static_cast<RenderFrameHostImpl*>(
       web_contents()->GetFocusedFrame());
   if (rfh)
-    rfh->ExtendSelectionAndDelete(before, after);
+    rfh->GetFrameInputHandler()->ExtendSelectionAndDelete(before, after);
 }
 
 void BrowserPluginGuest::OnLockMouse(bool user_gesture,