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

ash/display/mirror_window_controller.cc

Index: ash/display/mirror_window_controller.cc
diff --git a/ash/display/mirror_window_controller.cc b/ash/display/mirror_window_controller.cc
index 69de04273bb62859bcc0823f6e0659b30cf74998..37dcf3bca25657135df57766c82bb2aa921477c9 100644
--- a/ash/display/mirror_window_controller.cc
+++ b/ash/display/mirror_window_controller.cc
@@ -16,14 +16,15 @@
 #include "ash/display/display_info.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/root_window_transformers.h"
-#include "ash/host/window_tree_host_factory.h"
+#include "ash/host/ash_window_tree_host.h"
+#include "ash/host/root_window_transformer.h"
 #include "ash/root_window_settings.h"
 #include "ash/shell.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/client/capture_client.h"
-#include "ui/aura/root_window_transformer.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
+#include "ui/aura/window_tree_host.h"
 #include "ui/base/layout.h"
 #include "ui/compositor/reflector.h"
 #include "ui/gfx/canvas.h"
@@ -79,54 +80,54 @@ MirrorWindowController::~MirrorWindowController() {
 
 void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
   static int mirror_host_count = 0;
-
-  if (!host_.get()) {
+  if (!ash_host_.get()) {
     const gfx::Rect& bounds_in_native = display_info.bounds_in_native();
-    host_.reset(Shell::GetInstance()->window_tree_host_factory()->
-        CreateWindowTreeHost(bounds_in_native));
-    host_->window()->SetName(
+    ash_host_.reset(AshWindowTreeHost::Create(bounds_in_native));
+    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
+    host->window()->SetName(
         base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
-    host_->compositor()->SetBackgroundColor(SK_ColorBLACK);
+    host->compositor()->SetBackgroundColor(SK_ColorBLACK);
     // No need to remove the observer because the DisplayController outlives the
     // host.
-    host_->AddObserver(Shell::GetInstance()->display_controller());
-    host_->AddObserver(this);
+    host->AddObserver(Shell::GetInstance()->display_controller());
+    host->AddObserver(this);
     // TODO(oshima): TouchHUD is using idkey.
-    InitRootWindowSettings(host_->window())->display_id = display_info.id();
-    host_->InitHost();
+    InitRootWindowSettings(host->window())->display_id = display_info.id();
+    host->InitHost();
 #if defined(USE_X11)
-    DisableInput(host_->GetAcceleratedWidget());
+    DisableInput(host->GetAcceleratedWidget());
 #endif
 
-    aura::client::SetCaptureClient(host_->window(), new NoneCaptureClient());
-    host_->Show();
+    aura::client::SetCaptureClient(host->window(), new NoneCaptureClient());
+    host->Show();
 
     // TODO(oshima): Start mirroring.
     aura::Window* mirror_window = new aura::Window(NULL);
     mirror_window->Init(aura::WINDOW_LAYER_TEXTURED);
-    host_->window()->AddChild(mirror_window);
-    mirror_window->SetBounds(host_->window()->bounds());
+    host->window()->AddChild(mirror_window);
+    mirror_window->SetBounds(host->window()->bounds());
     mirror_window->Show();
     reflector_ = ui::ContextFactory::GetInstance()->CreateReflector(
         Shell::GetPrimaryRootWindow()->GetHost()->compositor(),
         mirror_window->layer());
   } else {
-    GetRootWindowSettings(host_->window())->display_id = display_info.id();
-    host_->SetBounds(display_info.bounds_in_native());
+    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
+    GetRootWindowSettings(host->window())->display_id = display_info.id();
+    host->SetBounds(display_info.bounds_in_native());
   }
 
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
       Shell::GetScreen()->GetPrimaryDisplay().id());
   DCHECK(display_manager->IsMirrored());
-  scoped_ptr<aura::RootWindowTransformer> transformer(
+  scoped_ptr<RootWindowTransformer> transformer(
       CreateRootWindowTransformerForMirroredDisplay(source_display_info,
                                                     display_info));
-  host_->SetRootWindowTransformer(transformer.Pass());
+  ash_host_->SetRootWindowTransformer(transformer.Pass());
 }
 
 void MirrorWindowController::UpdateWindow() {
-  if (host_.get()) {
+  if (ash_host_.get()) {
     DisplayManager* display_manager = Shell::GetInstance()->display_manager();
     const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
         display_manager->mirrored_display_id());
@@ -135,17 +136,18 @@ void MirrorWindowController::UpdateWindow() {
 }
 
 void MirrorWindowController::Close() {
-  if (host_.get()) {
+  if (ash_host_.get()) {
+    aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
     ui::ContextFactory::GetInstance()->RemoveReflector(reflector_);
     reflector_ = NULL;
     NoneCaptureClient* capture_client = static_cast<NoneCaptureClient*>(
-        aura::client::GetCaptureClient(host_->window()));
-    aura::client::SetCaptureClient(host_->window(), NULL);
+        aura::client::GetCaptureClient(host->window()));
+    aura::client::SetCaptureClient(host->window(), NULL);
     delete capture_client;
 
-    host_->RemoveObserver(Shell::GetInstance()->display_controller());
-    host_->RemoveObserver(this);
-    host_.reset();
+    host->RemoveObserver(Shell::GetInstance()->display_controller());
+    host->RemoveObserver(this);
+    ash_host_.reset();
   }
 }
 
@@ -154,13 +156,16 @@ void MirrorWindowController::OnHostResized(const aura::WindowTreeHost* host) {
     return;
   mirror_window_host_size_ = host->GetBounds().size();
   reflector_->OnMirroringCompositorResized();
-  host_->SetRootWindowTransformer(CreateRootWindowTransformer().Pass());
+  ash_host_->SetRootWindowTransformer(CreateRootWindowTransformer().Pass());
   Shell::GetInstance()->display_controller()->cursor_window_controller()->
       UpdateLocation();
 }
 
+aura::Window* MirrorWindowController::GetWindow() {
+  return ash_host_.get() ? ash_host_->AsWindowTreeHost()->window() : NULL;
+}
 
-scoped_ptr<aura::RootWindowTransformer>
+scoped_ptr<RootWindowTransformer>
 MirrorWindowController::CreateRootWindowTransformer() const {
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   const DisplayInfo& mirror_display_info = display_manager->GetDisplayInfo(
@@ -168,7 +173,7 @@ MirrorWindowController::CreateRootWindowTransformer() const {
   const DisplayInfo& source_display_info = display_manager->GetDisplayInfo(
       Shell::GetScreen()->GetPrimaryDisplay().id());
   DCHECK(display_manager->IsMirrored());
-  return scoped_ptr<aura::RootWindowTransformer>(
+  return scoped_ptr<RootWindowTransformer>(
       CreateRootWindowTransformerForMirroredDisplay(source_display_info,
                                                     mirror_display_info));
 }