Makes GetRootWindow() public on Window so we can begin to convert uses of RootWindow::GetInstance().

ui/aura/root_window.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/aura/root_window.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 389 matching lines @@
 void RootWindow::AdvanceQueuedTouchEvent(Window* window, bool processed) {
   scoped_ptr<GestureRecognizer::Gestures> gestures;
   gestures.reset(gesture_recognizer_->AdvanceTouchQueue(window, processed));
   ProcessGestures(gestures.get());
 }
 
 void RootWindow::SetGestureRecognizerForTesting(GestureRecognizer* gr) {
   gesture_recognizer_.reset(gr);
 }
 
+#if !defined(NDEBUG)
+void RootWindow::ToggleFullScreen() {
+  host_->ToggleFullScreen();
+}
+#endif
+
+RootWindow* RootWindow::GetRootWindow() {
+  return this;
+}
+
 void RootWindow::SetTransform(const ui::Transform& transform) {
   Window::SetTransform(transform);
 
   // If the layer is not animating, then we need to update the host size
   // immediately.
   if (!layer()->GetAnimator()->is_animating())
     OnHostResized(host_->GetSize());
 }
 
-#if !defined(NDEBUG)
-void RootWindow::ToggleFullScreen() {
-  host_->ToggleFullScreen();
-}
-#endif
-
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindow, private:
 
 RootWindow::RootWindow()
     : Window(NULL),
       host_(aura::RootWindowHost::Create(GetInitialHostWindowBounds())),
       ALLOW_THIS_IN_INITIALIZER_LIST(schedule_paint_factory_(this)),
       ALLOW_THIS_IN_INITIALIZER_LIST(event_factory_(this)),
       mouse_button_flags_(0),
       last_cursor_(kCursorNull),
@@ skipping 185 matching lines @@
 }
 
 bool RootWindow::CanReceiveEvents() const {
   return IsVisible();
 }
 
 internal::FocusManager* RootWindow::GetFocusManager() {
   return this;
 }
 
-RootWindow* RootWindow::GetRootWindow() {
-  return this;
-}
-
 void RootWindow::OnWindowDetachingFromRootWindow(Window* detached) {
   DCHECK(capture_window_ != this);
 
   // If the ancestor of the capture window is detached,
   // release the capture.
   if (detached->Contains(capture_window_) && detached != this)
     ReleaseCapture(capture_window_);
 
   // If the ancestor of the focused window is detached,
   // release the focus.
@@ skipping 114 matching lines @@
   // TODO(derat|oshima): Don't use mouse_button_flags_ as it's
   // is currently broken. See/ crbug.com/107931.
   MouseEvent event(ui::ET_MOUSE_MOVED,
                    orig_mouse_location,
                    orig_mouse_location,
                    0);
   DispatchMouseEvent(&event);
 }
 
 }  // namespace aura