[Ozone] Rename GetVSyncProvider to CreateVSyncProvider

ui/gfx/ozone/surface_factory_ozone.h

 // Copyright (c) 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.
 
 #ifndef UI_GFX_OZONE_SURFACE_LNUX_FACTORY_OZONE_H_
 #define UI_GFX_OZONE_SURFACE_LNUX_FACTORY_OZONE_H_
 
 #include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/native_library.h"
 #include "ui/gfx/gfx_export.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
 
 namespace gfx {
 class Screen;
 class VSyncProvider;
@@ skipping 99 matching lines @@
   // Returns a SkCanvas for the backing buffers. Drawing to the canvas will draw
   // to the native surface. The canvas is intended for use when no EGL
   // acceleration is possible. Its implementation is optional when an EGL
   // backend is provided for rendering.
   virtual SkCanvas* GetCanvasForWidget(gfx::AcceleratedWidget w);
 
   // Returns a gfx::VsyncProvider for the provided AcceleratedWidget. Note
   // that this may be called after we have entered the sandbox so if there are
   // operations (e.g. opening a file descriptor providing vsync events) that
   // must be done outside of the sandbox, they must have been completed
-  // in InitializeHardware. Returns NULL on error.
-  virtual gfx::VSyncProvider* GetVSyncProvider(gfx::AcceleratedWidget w) = 0;
+  // in InitializeHardware. Returns an empty scoped_ptr on error.
+  virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider(
+      gfx::AcceleratedWidget w) = 0;
 
   // Returns an array of EGL properties, which can be used in any EGL function
   // used to select a display configuration. Note that all properties should be
   // immediately followed by the corresponding desired value and array should be
   // terminated with EGL_NONE. Ownership of the array is not transferred to
   // caller. desired_list contains list of desired EGL properties and values.
   virtual const int32* GetEGLSurfaceProperties(const int32* desired_list);
 
   // Create a default SufaceFactoryOzone implementation useful for tests.
   static SurfaceFactoryOzone* CreateTestHelper();
 
  private:
   static SurfaceFactoryOzone* impl_; // not owned
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_OZONE_SURFACE_LNUX_FACTORY_OZONE_H_