platform-window: Add a PlatformWindowFactory for creating windows.

ui/ozone/public/ozone_platform.cc

Index: ui/ozone/public/ozone_platform.cc
diff --git a/ui/ozone/public/ozone_platform.cc b/ui/ozone/public/ozone_platform.cc
index 355c84dfe70330e9c09e0b2461487d72692c0e4a..a06a5196c3a7c1e48b282230fd91a7bb61053039 100644
--- a/ui/ozone/public/ozone_platform.cc
+++ b/ui/ozone/public/ozone_platform.cc
@@ -10,6 +10,8 @@
 #include "ui/ozone/platform_selection.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
+#include "ui/platform_window/platform_window.h"
+#include "ui/platform_window/platform_window_factory.h"
 
 namespace ui {
 
@@ -18,6 +20,22 @@ namespace {
 bool g_platform_initialized_ui = false;
 bool g_platform_initialized_gpu = false;
 
+class OzoneWindowFactory : public PlatformWindowFactory {
+ public:
+  static void CreateInstance() { new OzoneWindowFactory(); }
+
+ private:
+  OzoneWindowFactory() {}
+  virtual ~OzoneWindowFactory() {}
+
+  // PlatformWindowFactory:
+  virtual scoped_ptr<PlatformWindow> CreatePlatformWindow(
+      PlatformWindowDelegate* delegate,
+      const gfx::Rect& bounds) OVERRIDE {
+    return ui::OzonePlatform::GetInstance()->CreatePlatformWindow(delegate,
+                                                                  bounds);
+  }
+};
 }
 
 OzonePlatform::OzonePlatform() {
@@ -42,6 +60,7 @@ void OzonePlatform::InitializeForUI() {
   // This is deliberately created after initializing so that the platform can
   // create its own version of DDM.
   DeviceDataManager::CreateInstance();
+  OzoneWindowFactory::CreateInstance();
 }
 
 // static