Require ACK for editor-related changes not originating from browser.

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 e5ab98921e34ca0945ec5f34f3900c3bdc96b64c..a87f272ed6fb32426adb02636f8c5fe49ef9a491 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -332,6 +332,19 @@ class CONTENT_EXPORT RenderWidget
   void OnImeBatchStateChanged(bool is_begin);
   void OnShowImeIfNeeded();
 #endif
+  // Returns whether strict IME processing has been enabled.
+  bool has_strict_ime_processing() { return strict_ime_processing_; }
+  // Whenever an IME event that needs an acknowledgement is sent to the browser,
+  // the number of outstanding IME events that needs acknowledgement should be
+  // incremented.
+  void IncrementOutstandingImeEventAcknowledgements();
+  // If there are outstanding IME events that needs to be acknowledged, all
+  // new IME events should be discarded. This only returns true if strict IME
+  // processing is enabled.
+  bool HasOutstandingImeEventAcknowledgements();
+  // Called by the browser process for every required IME acknowledgement.
+  void OnImeAcknowledgeImeEvent();
+
   void OnSnapshot(const gfx::Rect& src_subrect);
   void OnSetBrowserRenderingStats(const BrowserRenderingStats& stats);
 
@@ -715,6 +728,14 @@ class CONTENT_EXPORT RenderWidget
   // frame.
   ui::LatencyInfo latency_info_;
 
+  // Specifies if the strict IME processing has been enabled.
+  bool strict_ime_processing_;

[kochi, 2013/07/08 04:28:43]

Same here. rename the member as has_strict_ime_processing_?

[nyquist, 2013/07/09 07:47:36]

Done.

+
+  // A counter for number of outstanding messages from the renderer to the
+  // browser regarding IME-type events that have not been acknowledged by the
+  // browser.
+  int outstanding_ime_acknowledgements_;
+
   base::WeakPtrFactory<RenderWidget> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);