base: Do not allow MessagePumpObservers to consume events.

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index a671b3c5a66ff427c3b31bfe16a0c87a86884c20..29ab6c911b65d922d071fc84019017b7dafda0f5 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -191,10 +191,7 @@ class WebDragSourceAura : public base::MessageLoopForUI::Observer,
   }
 
   // MessageLoop::Observer implementation:
-  virtual base::EventStatus WillProcessEvent(
-      const base::NativeEvent& event) OVERRIDE {
-    return base::EVENT_CONTINUE;
-  }
+  virtual void WillProcessEvent(const base::NativeEvent& event) OVERRIDE {}
   virtual void DidProcessEvent(const base::NativeEvent& event) OVERRIDE {
     if (!contents_)
       return;