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

chrome/browser/ui/panels/panel_browser_frame_view.h

Index: chrome/browser/ui/panels/panel_browser_frame_view.h
diff --git a/chrome/browser/ui/panels/panel_browser_frame_view.h b/chrome/browser/ui/panels/panel_browser_frame_view.h
index d720f8f3d7ba05361ed009eb7ebf242159bef897..a2cb0dc682ffb33dde41a28f103e31fd5f20a2d4 100644
--- a/chrome/browser/ui/panels/panel_browser_frame_view.h
+++ b/chrome/browser/ui/panels/panel_browser_frame_view.h
@@ -107,14 +107,13 @@ class PanelBrowserFrameView : public BrowserNonClientFrameView,
 
     virtual bool IsCursorInViewBounds() const;
 
-  #if defined(OS_WIN)
-    virtual void WillProcessMessage(const MSG& msg) OVERRIDE;
-    virtual void DidProcessMessage(const MSG& msg) OVERRIDE;
+  #if defined(OS_WIN) || defined(TOUCH_UI) || defined(USE_AURA)
+    virtual base::EventStatus WillProcessEvent(
+        const base::NativeEvent& event) OVERRIDE;
+    virtual void DidProcessEvent(const base::NativeEvent& event) OVERRIDE;
   #elif defined(TOOLKIT_USES_GTK)
     virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
     virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
-  #elif defined(USE_AURA)
-    virtual EventStatus WillProcessXEvent(XEvent* xevent) OVERRIDE;
   #endif
 
    private: