Desktop Aura: Allow tab drags out of window.

ui/views/widget/native_widget_aura.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/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_change_observer.h"
@@ skipping 215 matching lines @@
 #endif  // !defined(OS_MACOSX)
 
   drop_helper_.reset(new DropHelper(GetWidget()->GetRootView()));
   if (params.type != Widget::InitParams::TYPE_TOOLTIP &&
       params.type != Widget::InitParams::TYPE_POPUP) {
     aura::client::SetDragDropDelegate(window_, this);
   }
 
   aura::client::SetActivationDelegate(window_, this);
 
-  if (desktop_helper_.get()) {
+  if (desktop_helper_.get())
     desktop_helper_->PostInitialize();
-    // TODO(erg): Move this somewhere else?
-    desktop_helper_->ShowRootWindow();
-  }
 }
 
 NonClientFrameView* NativeWidgetAura::CreateNonClientFrameView() {
   return NULL;
 }
 
 void NativeWidgetAura::UpdateFrameAfterFrameChange() {
 }
 
 bool NativeWidgetAura::ShouldUseNativeFrame() const {
@@ skipping 406 matching lines @@
   return gfx::Screen::GetDisplayNearestWindow(GetNativeView()).work_area();
 }
 
 void NativeWidgetAura::SetInactiveRenderingDisabled(bool value) {
   if (!value)
     active_window_observer_.reset();
   else
     active_window_observer_.reset(new ActiveWindowObserver(this));
 }
 
-Widget::MoveLoopResult NativeWidgetAura::RunMoveLoop() {
+Widget::MoveLoopResult NativeWidgetAura::RunMoveLoop(
+    const gfx::Point& drag_offset) {
   if (window_->parent() &&
       aura::client::GetWindowMoveClient(window_->parent())) {
     SetCapture();
-    aura::client::GetWindowMoveClient(window_->parent())->RunMoveLoop(window_);
+    aura::client::GetWindowMoveClient(window_->parent())->RunMoveLoop(
+        window_, drag_offset);
     return Widget::MOVE_LOOP_SUCCESSFUL;
   }
   return Widget::MOVE_LOOP_CANCELED;
 }
 
 void NativeWidgetAura::EndMoveLoop() {
   if (window_->parent() &&
       aura::client::GetWindowMoveClient(window_->parent())) {
     aura::client::GetWindowMoveClient(window_->parent())->EndMoveLoop();
   }
@@ skipping 362 matching lines @@
   return aura::Env::GetInstance()->is_mouse_button_down();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views