ozone: Add OzoneWindowFactory & OzoneWindow

ui/gfx/ozone/dri/dri_surface_factory.cc

Index: ui/gfx/ozone/dri/dri_surface_factory.cc
diff --git a/ui/gfx/ozone/dri/dri_surface_factory.cc b/ui/gfx/ozone/dri/dri_surface_factory.cc
index 911d341634a728e8de1186fc2b93a3b5c274c7be..7854f1cdafeec4c5aecb21f37bb132689ee497f7 100644
--- a/ui/gfx/ozone/dri/dri_surface_factory.cc
+++ b/ui/gfx/ozone/dri/dri_surface_factory.cc
@@ -26,7 +26,8 @@ namespace {
 const char kDefaultGraphicsCardPath[] = "/dev/dri/card0";
 const char kDPMSProperty[] = "DPMS";
 
-const gfx::AcceleratedWidget kDefaultWidgetHandle = 1;
+const gfx::AcceleratedWidget kDefaultWidgetHandle =
+    kDefaultAcceleratedWidgetForSingleWindow;
 
 // TODO(dnicoara) Read the cursor plane size from the hardware.
 const gfx::Size kCursorSize(64, 64);
@@ -178,6 +179,12 @@ DriSurfaceFactory::InitializeHardware() {
     return state_;
   }
 
+  // TODO(dnicoara) When there's more information on which display we want,
+  // then we can return the widget associated with the display.
+  // For now just assume we have 1 display device and return it.
+  if (!controller_.get())
+    controller_.reset(new HardwareDisplayController());
+
   state_ = INITIALIZED;
   return state_;
 }
@@ -194,12 +201,6 @@ void DriSurfaceFactory::ShutdownHardware() {
 gfx::AcceleratedWidget DriSurfaceFactory::GetAcceleratedWidget() {
   CHECK(state_ != FAILED);
 
-  // TODO(dnicoara) When there's more information on which display we want,
-  // then we can return the widget associated with the display.
-  // For now just assume we have 1 display device and return it.
-  if (!controller_.get())
-    controller_.reset(new HardwareDisplayController());
-
   // TODO(dnicoara) We only have 1 display for now, so only 1 AcceleratedWidget.
   // When we'll support multiple displays this needs to be changed to return a
   // different handle for every display.