Introdcue AshWindowTreeHost and move ash/chrome specific code in WTH to ash.

Other notable changes:
* Removed WindowTreeHostFactory as this is no longer necessary.
* Moved RootWindowTransformer to ash/host
* Removed Set/GetInsets which are no longer necessary (a code in SetInsets is now a part of
SetRootWindowTransformer)
* Added TransformerHelper that implements common behavior to transform root window for AshWindowTreeHost
* Added DEPS files
* Updated metro_viewer code to make sure it creates ash::AshRemoteWindowHostTree

A few more simplifications to come:
* Simplify RootWindowTransformer
* Eliminate EnvObserver in AshWindowTreeHostX11

I'll also work on DEPS reorg to make it more explicit under ash/

BUG=355771
TEST=No functional change. ui/aura/window_tree_host_x11_unittests has been moved to ash/host/ash_window_tree_host_x11_unittests

Review URL: https://codereview.chromium.org/201573015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263192 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 9 deletions

diff --git a/ash/root_window_controller.h b/ash/root_window_controller.h
index e9f6b8e..6199a5c 100644
--- a/ash/root_window_controller.h
+++ b/ash/root_window_controller.h
@@ -47,6 +47,7 @@ class ScopedCaptureClient;
 }
 
 namespace ash {
+class AshWindowTreeHost;
 class AlwaysOnTopController;
 class AnimatingDesktopController;
 class DesktopBackgroundWidgetController;
@@ -80,14 +81,14 @@ class ASH_EXPORT RootWindowController : public ShellObserver {
  public:
 
   // Creates and Initialize the RootWindowController for primary display.
-  static void CreateForPrimaryDisplay(aura::WindowTreeHost* host);
+  static void CreateForPrimaryDisplay(AshWindowTreeHost* host);
 
   // Creates and Initialize the RootWindowController for secondary displays.
-  static void CreateForSecondaryDisplay(aura::WindowTreeHost* host);
+  static void CreateForSecondaryDisplay(AshWindowTreeHost* host);
 
   // Creates and Initialize the RootWindowController for virtual
   // keyboard displays.
-  static void CreateForVirtualKeyboardDisplay(aura::WindowTreeHost* host);
+  static void CreateForVirtualKeyboardDisplay(AshWindowTreeHost* host);
 
   // Returns a RootWindowController that has a shelf for given
   // |window|. This returns the RootWindowController for the |window|'s
@@ -106,10 +107,13 @@ class ASH_EXPORT RootWindowController : public ShellObserver {
 
   virtual ~RootWindowController();
 
-  aura::Window* root_window() { return host_->window(); }
-  const aura::Window* root_window() const { return host_->window(); }
-  aura::WindowTreeHost* host() { return host_.get(); }
-  const aura::WindowTreeHost* host() const { return host_.get(); }
+  AshWindowTreeHost* ash_host() { return ash_host_.get(); }
+  const AshWindowTreeHost* ash_host() const { return ash_host_.get(); }
+
+  aura::WindowTreeHost* GetHost();
+  const aura::WindowTreeHost* GetHost() const;
+  aura::Window* GetRootWindow();
+  const aura::Window* GetRootWindow() const;
 
   RootWindowLayoutManager* root_window_layout() { return root_window_layout_; }
 
@@ -235,7 +239,7 @@ class ASH_EXPORT RootWindowController : public ShellObserver {
   bool IsVirtualKeyboardWindow(aura::Window* window);
 
  private:
-  explicit RootWindowController(aura::WindowTreeHost* host);
+  explicit RootWindowController(AshWindowTreeHost* host);
   enum RootWindowType {
     PRIMARY,
     SECONDARY,
@@ -267,7 +271,7 @@ class ASH_EXPORT RootWindowController : public ShellObserver {
   virtual void OnLoginStateChanged(user::LoginStatus status) OVERRIDE;
   virtual void OnTouchHudProjectionToggled(bool enabled) OVERRIDE;
 
-  scoped_ptr<aura::WindowTreeHost> host_;
+  scoped_ptr<AshWindowTreeHost> ash_host_;
   RootWindowLayoutManager* root_window_layout_;
 
   scoped_ptr<StackingController> stacking_controller_;