Allow some InputConnection methods to be called on UI thread

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 0ff4d8fa3a51560cd9d28164727af198750ef72e..be6a4aafd3fc1c3e6b7e5badae85b49eb98019fe 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -506,6 +506,10 @@ class CONTENT_EXPORT RenderWidget
 
   // Called by the browser process to update text input state.
   void OnRequestTextInputStateUpdate();
+
+  // Called by the browser process to begin (when |begin| is set) or end batch
+  // edit mode. Note that text input state will not be updated in this mode.
+  void OnImeBatchEdit(bool begin);
 #endif
 
   // Called by the browser process to update the cursor and composition
@@ -671,6 +675,10 @@ class CONTENT_EXPORT RenderWidget
   // ImeEventGuard. We keep track of the outermost one, and update it as needed.
   ImeEventGuard* ime_event_guard_;
 
+  // Whether IME is in batch edit mode, in which case we do not update text
+  // input state.
+  bool ime_in_batch_edit_;
+
   // True if we have requested this widget be closed.  No more messages will
   // be sent, except for a Close.
   bool closing_;