Revert of Clean up WindowEventDispatcher some more.

ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc

 // Copyright (c) 2012 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 "ui/views/widget/desktop_aura/desktop_window_tree_host_win.h"
 
 #include "base/win/metro.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 568 matching lines @@
 void DesktopWindowTreeHostWin::MoveCursorToNative(const gfx::Point& location) {
   POINT cursor_location = location.ToPOINT();
   ::ClientToScreen(GetHWND(), &cursor_location);
   ::SetCursorPos(cursor_location.x, cursor_location.y);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostWin, ui::EventSource implementation:
 
 ui::EventProcessor* DesktopWindowTreeHostWin::GetEventProcessor() {
-  return dispatcher();
+  return delegate_->GetEventProcessor();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostWin, aura::AnimationHost implementation:
 
 void DesktopWindowTreeHostWin::SetHostTransitionOffsets(
     const gfx::Vector2d& top_left_delta,
     const gfx::Vector2d& bottom_right_delta) {
   gfx::Rect bounds_without_expansion = GetBounds();
   window_expansion_top_left_delta_ = top_left_delta;
@@ skipping 129 matching lines @@
   return GetWidget()->widget_delegate()->ShouldHandleSystemCommands();
 }
 
 void DesktopWindowTreeHostWin::HandleAppDeactivated() {
   native_widget_delegate_->EnableInactiveRendering();
 }
 
 void DesktopWindowTreeHostWin::HandleActivationChanged(bool active) {
   // This can be invoked from HWNDMessageHandler::Init(), at which point we're
   // not in a good state and need to ignore it.
-  // TODO(beng): Do we need this still now the host owns the dispatcher?
-  if (!dispatcher())
+  if (!delegate_)
     return;
 
   if (active)
-    OnHostActivated();
+    delegate_->OnHostActivated();
   desktop_native_widget_aura_->HandleActivationChanged(active);
 }
 
 bool DesktopWindowTreeHostWin::HandleAppCommand(short command) {
   // We treat APPCOMMAND ids as an extension of our command namespace, and just
   // let the delegate figure out what to do...
   return GetWidget()->widget_delegate() &&
       GetWidget()->widget_delegate()->ExecuteWindowsCommand(command);
 }
 
 void DesktopWindowTreeHostWin::HandleCancelMode() {
-  dispatcher()->DispatchCancelModeEvent();
+  delegate_->OnHostCancelMode();
 }
 
 void DesktopWindowTreeHostWin::HandleCaptureLost() {
-  OnHostLostWindowCapture();
+  delegate_->OnHostLostWindowCapture();
   native_widget_delegate_->OnMouseCaptureLost();
 }
 
 void DesktopWindowTreeHostWin::HandleClose() {
   GetWidget()->Close();
 }
 
 bool DesktopWindowTreeHostWin::HandleCommand(int command) {
   return GetWidget()->widget_delegate()->ExecuteWindowsCommand(command);
 }
@@ skipping 49 matching lines @@
 void DesktopWindowTreeHostWin::HandleVisibilityChanging(bool visible) {
   native_widget_delegate_->OnNativeWidgetVisibilityChanging(visible);
 }
 
 void DesktopWindowTreeHostWin::HandleVisibilityChanged(bool visible) {
   native_widget_delegate_->OnNativeWidgetVisibilityChanged(visible);
 }
 
 void DesktopWindowTreeHostWin::HandleClientSizeChanged(
     const gfx::Size& new_size) {
-  OnHostResized(new_size);
+  if (delegate_)
+    OnHostResized(new_size);
 }
 
 void DesktopWindowTreeHostWin::HandleFrameChanged() {
   SetWindowTransparency();
   // Replace the frame and layout the contents.
   GetWidget()->non_client_view()->UpdateFrame();
 }
 
 void DesktopWindowTreeHostWin::HandleNativeFocus(HWND last_focused_window) {
   // TODO(beng): inform the native_widget_delegate_.
@@ skipping 168 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views