MacViews: Correctly handle character events when there's an active TextInputClient.

ui/views/cocoa/bridged_content_view.h

Index: ui/views/cocoa/bridged_content_view.h
diff --git a/ui/views/cocoa/bridged_content_view.h b/ui/views/cocoa/bridged_content_view.h
index f6952a25e80dd9c7a712cc9e24458632e715e6c1..c04515dd324b5b5ceaffb44afd0bd12814aacd46 100644
--- a/ui/views/cocoa/bridged_content_view.h
+++ b/ui/views/cocoa/bridged_content_view.h
@@ -39,6 +39,9 @@ class View;
   // The keyDown event currently being handled, nil otherwise.
   NSEvent* keyDownEvent_;
 
+  // Whether there's an active key down event which is not handled yet.
+  BOOL hasUnhandledKeyDownEvent_;
+
   // The last tooltip text, used to limit updates.
   base::string16 lastTooltipText_;