cc: Make OutputSurface::Reshape abstract

cc/test/pixel_test_output_surface.h

Index: cc/test/pixel_test_output_surface.h
diff --git a/cc/test/pixel_test_output_surface.h b/cc/test/pixel_test_output_surface.h
index 3b3f3f967fedc2dc5a7d322dd22b4d996b506215..b11e7b37cb88c1b4dc2ca0d54089e8ccdfa6552a 100644
--- a/cc/test/pixel_test_output_surface.h
+++ b/cc/test/pixel_test_output_surface.h
@@ -23,9 +23,9 @@ class PixelTestOutputSurface : public OutputSurface {
   void DiscardBackbuffer() override;
   void BindFramebuffer() override;
   void Reshape(const gfx::Size& size,
-               float scale_factor,
+               float device_scale_factor,
                const gfx::ColorSpace& color_space,
-               bool alpha) override;
+               bool has_alpha) override;
   bool HasExternalStencilTest() const override;
   void ApplyExternalStencil() override;
   void SwapBuffers(OutputSurfaceFrame frame) override;
@@ -35,15 +35,11 @@ class PixelTestOutputSurface : public OutputSurface {
   bool SurfaceIsSuspendForRecycle() const override;
   uint32_t GetFramebufferCopyTextureFormat() override;
 
-  void set_surface_expansion_size(const gfx::Size& surface_expansion_size) {
-    surface_expansion_size_ = surface_expansion_size;
-  }
   void set_has_external_stencil_test(bool has_test) {
     external_stencil_test_ = has_test;
   }
 
  private:
-  gfx::Size surface_expansion_size_;
   bool external_stencil_test_;
 };