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

chrome/browser/ui/views/tabs/dragged_tab_controller.cc

Index: chrome/browser/ui/views/tabs/dragged_tab_controller.cc
diff --git a/chrome/browser/ui/views/tabs/dragged_tab_controller.cc b/chrome/browser/ui/views/tabs/dragged_tab_controller.cc
index ab7e994f9ab022d511baf762cf58ae80ce365360..5c11e6948b9a668793af8c9e5d54fcca856501a7 100644
--- a/chrome/browser/ui/views/tabs/dragged_tab_controller.cc
+++ b/chrome/browser/ui/views/tabs/dragged_tab_controller.cc
@@ -505,21 +505,27 @@ void DraggedTabController::Observe(int type,
 // DraggedTabController, MessageLoop::Observer implementation:
 
 #if defined(OS_WIN)
-void DraggedTabController::WillProcessMessage(const MSG& msg) {
+base::EventStatus DraggedTabController::WillProcessEvent(
+    const base::NativeEvent& event) {
+  return base::EVENT_CONTINUE;
 }
 
-void DraggedTabController::DidProcessMessage(const MSG& msg) {
+void DraggedTabController::DidProcessEvent(const base::NativeEvent& event) {
   // If the user presses ESC during a drag, we need to abort and revert things
   // to the way they were. This is the most reliable way to do this since no
   // single view or window reliably receives events throughout all the various
   // kinds of tab dragging.
-  if (msg.message == WM_KEYDOWN && msg.wParam == VK_ESCAPE)
+  if (event.message == WM_KEYDOWN && event.wParam == VK_ESCAPE)
     EndDrag(true);
 }
-#elif defined(TOUCH_UI)
-base::MessagePumpObserver::EventStatus
-    DraggedTabController::WillProcessXEvent(XEvent* xevent) {
-  return EVENT_CONTINUE;
+#elif defined(TOUCH_UI) || defined(USE_AURA)
+base::EventStatus DraggedTabController::WillProcessEvent(
+    const base::NativeEvent& event) {
+  return base::EVENT_CONTINUE;
+}
+
+void DraggedTabController::DidProcessEvent(const base::NativeEvent& event) {
+  NOTIMPLEMENTED();
 }
 #elif defined(TOOLKIT_USES_GTK)
 void DraggedTabController::WillProcessEvent(GdkEvent* event) {