[WIP Approach 2] Straighten up input method reactivation

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 391ee08c8529bf4013c93c2332da883bc2bd647c..136b8e4c34f173bb8df2899fe64b6d5285e4f8fc 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -346,6 +346,9 @@ class CONTENT_EXPORT RenderWidget
   // |policy| see the comment on MessageDeliveryPolicy.
   void QueueMessage(IPC::Message* msg, MessageDeliveryPolicy policy);
 
+  void CancelComposition();
+  void OnFocusedNodeChanged(bool is_editable, const gfx::Rect& node_bounds);
+
   // Check whether IME thread is being used or not.
   bool IsUsingImeThread();
 
@@ -507,6 +510,9 @@ class CONTENT_EXPORT RenderWidget
   void OnSetFrameSinkId(const cc::FrameSinkId& frame_sink_id);
   void OnHandleCompositorProto(const std::vector<uint8_t>& proto);
 
+  void UpdateTextInputStateInternal(ShowIme show_ime,
+                                    ChangeSource change_source,
+                                    bool ignore_until_ack);
 #if defined(OS_ANDROID)
   // Called when we send IME event that expects an ACK.
   void OnImeEventSentForAck(const blink::WebTextInputInfo& info);
@@ -687,6 +693,10 @@ class CONTENT_EXPORT RenderWidget
   // input state.
   bool ime_in_batch_edit_;
 
+  // Indicates that we will ignore IME related messages from host until the
+  // new text input state update is acked by the host.
+  bool ime_ignore_until_acked_;;
+
   // True if we have requested this widget be closed.  No more messages will
   // be sent, except for a Close.
   bool closing_;