cc: Make OutputSurface::Reshape abstract

cc/test/pixel_test_output_surface.cc

Index: cc/test/pixel_test_output_surface.cc
diff --git a/cc/test/pixel_test_output_surface.cc b/cc/test/pixel_test_output_surface.cc
index 93cc427664d879b875ebaee8ced73ee651287f59..11424c003caf199ec11212a4244818fc5f6f8bfc 100644
--- a/cc/test/pixel_test_output_surface.cc
+++ b/cc/test/pixel_test_output_surface.cc
@@ -38,12 +38,15 @@ void PixelTestOutputSurface::BindFramebuffer() {
 }
 
 void PixelTestOutputSurface::Reshape(const gfx::Size& size,
-                                     float scale_factor,
+                                     float device_scale_factor,
                                      const gfx::ColorSpace& color_space,
                                      bool has_alpha) {
-  gfx::Size expanded_size(size.width() + surface_expansion_size_.width(),
-                          size.height() + surface_expansion_size_.height());
-  OutputSurface::Reshape(expanded_size, scale_factor, color_space, has_alpha);
+  if (context_provider()) {
+    context_provider()->ContextGL()->ResizeCHROMIUM(
+        size.width(), size.height(), device_scale_factor, has_alpha);
+  } else {
+    software_device()->Resize(size, device_scale_factor);
+  }
 }
 
 bool PixelTestOutputSurface::HasExternalStencilTest() const {