platform-window: Add a PlatformWindowFactory for creating windows.

mojo/services/native_viewport/platform_viewport.cc

Index: mojo/services/native_viewport/platform_viewport.cc
diff --git a/mojo/services/native_viewport/native_viewport_ozone.cc b/mojo/services/native_viewport/platform_viewport.cc
similarity index 66%
rename from mojo/services/native_viewport/native_viewport_ozone.cc
rename to mojo/services/native_viewport/platform_viewport.cc
index fa5648f5a5f28fc85b7b84a3f9ea7a78f4f50b55..1881ae0f6ea0884ca56c58cd7784b10d2fe81329 100644
--- a/mojo/services/native_viewport/native_viewport_ozone.cc
+++ b/mojo/services/native_viewport/platform_viewport.cc
@@ -1,33 +1,32 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2013 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 "mojo/services/native_viewport/native_viewport.h"
 
-#include "ui/events/event.h"
-#include "ui/events/platform/platform_event_dispatcher.h"
-#include "ui/events/platform/platform_event_source.h"
-#include "ui/ozone/public/cursor_factory_ozone.h"
-#include "ui/ozone/public/event_factory_ozone.h"
-#include "ui/ozone/public/ozone_platform.h"
-#include "ui/ozone/public/surface_factory_ozone.h"
+#include "ui/gfx/rect.h"
 #include "ui/platform_window/platform_window.h"
 #include "ui/platform_window/platform_window_delegate.h"
+#include "ui/platform_window/platform_window_factory.h"
+
+#if defined(USE_X11)
+#include "ui/platform_window/x11/x11_window_factory.h"
+#elif defined(OS_WIN)
+#include "ui/platform_window/win/win_window_factory.h"
+#elif defined(USE_OZONE)
+#include "ui/ozone/public/ozone_platform.h"
+#endif
 
 namespace mojo {
 namespace services {
 
-// TODO(spang): Deduplicate with NativeViewportX11.. but there's a hack
-// in there that prevents this.
-class NativeViewportOzone : public NativeViewport,
-                            public ui::PlatformWindowDelegate {
+class PlatformViewport : public NativeViewport,
+                         public ui::PlatformWindowDelegate {
  public:
-  explicit NativeViewportOzone(NativeViewportDelegate* delegate)
-      : delegate_(delegate) {
-    ui::OzonePlatform::InitializeForUI();
-  }
+  explicit PlatformViewport(NativeViewportDelegate* delegate)
+      : delegate_(delegate) {}
 
-  virtual ~NativeViewportOzone() {
+  virtual ~PlatformViewport() {
     // Destroy the platform-window while |this| is still alive.
     platform_window_.reset();
   }
@@ -35,8 +34,11 @@ class NativeViewportOzone : public NativeViewport,
  private:
   // Overridden from NativeViewport:
   virtual void Init(const gfx::Rect& bounds) OVERRIDE {
+    CHECK(!platform_window_);
+
     platform_window_ =
-        ui::OzonePlatform::GetInstance()->CreatePlatformWindow(this, bounds);
+        ui::PlatformWindowFactory::GetInstance()->CreatePlatformWindow(this,
+                                                                       bounds);
   }
 
   virtual void Show() OVERRIDE { platform_window_->Show(); }
@@ -86,13 +88,20 @@ class NativeViewportOzone : public NativeViewport,
   scoped_ptr<ui::PlatformWindow> platform_window_;
   NativeViewportDelegate* delegate_;
 
-  DISALLOW_COPY_AND_ASSIGN(NativeViewportOzone);
+  DISALLOW_COPY_AND_ASSIGN(PlatformViewport);
 };
 
 // static
 scoped_ptr<NativeViewport> NativeViewport::Create(
     NativeViewportDelegate* delegate) {
-  return scoped_ptr<NativeViewport>(new NativeViewportOzone(delegate)).Pass();
+#if defined(USE_X11)
+  ui::X11WindowFactory::CreateIfNecessary();
+#elif defined(OS_WIN)
+  ui::WinWindowFactory::CreateIfNecessary();
+#elif defined(USE_OZONE)
+  ui::OzonePlatform::InitializeForUI();
+#endif
+  return scoped_ptr<NativeViewport>(new PlatformViewport(delegate)).Pass();
 }
 
 }  // namespace services