Consolidate message observer API for win and aura (and touch).

chrome/browser/notifications/balloon_collection_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/notifications/balloon_collection_impl.h"
 
 #include "chrome/browser/notifications/balloon.h"
 #include "chrome/browser/ui/views/notifications/balloon_view.h"
 #include "ui/gfx/rect.h"
 
@@ skipping 15 matching lines @@
 }
 
 int BalloonCollectionImpl::Layout::VerticalEdgeMargin() const {
   return 0;
 }
 
 void BalloonCollectionImpl::PositionBalloons(bool reposition) {
   PositionBalloonsInternal(reposition);
 }
 
-void BalloonCollectionImpl::DidProcessMessage(const MSG& msg) {
-  switch (msg.message) {
+base::EventStatus BalloonCollectionImpl::WillProcessEvent(
+    const base::NativeEvent& event) {
+  return base::EVENT_CONTINUE;
+}
+
+void BalloonCollectionImpl::DidProcessEvent(const base::NativeEvent& event) {
+  switch (event.message) {
     case WM_MOUSEMOVE:
     case WM_MOUSELEAVE:
     case WM_NCMOUSELEAVE:
       HandleMouseMoveEvent();
       break;
   }
 }
 
 bool BalloonCollectionImpl::IsCursorInBalloonCollection() const {
   DWORD pos = GetMessagePos();
@@ skipping 19 matching lines @@
   else
     NOTREACHED();
 
   PositionBalloons(true);
 }
 
 // static
 BalloonCollection* BalloonCollection::Create() {
   return new BalloonCollectionImpl();
 }