Move output surface fallback from cc to embedders

cc/test/layer_tree_pixel_test.cc

 // Copyright 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.
 
 #include "cc/test/layer_tree_pixel_test.h"
 
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "cc/base/switches.h"
 #include "cc/layers/solid_color_layer.h"
@@ skipping 17 matching lines @@
 
 LayerTreePixelTest::LayerTreePixelTest()
     : pixel_comparator_(new ExactPixelComparator(true)),
       test_type_(PIXEL_TEST_GL),
       pending_texture_mailbox_callbacks_(0),
       impl_side_painting_(true) {
 }
 
 LayerTreePixelTest::~LayerTreePixelTest() {}
 
-scoped_ptr<OutputSurface> LayerTreePixelTest::CreateOutputSurface(
-    bool fallback) {
+scoped_ptr<OutputSurface> LayerTreePixelTest::CreateOutputSurface() {
   gfx::Size surface_expansion_size(40, 60);
   scoped_ptr<PixelTestOutputSurface> output_surface;
 
   switch (test_type_) {
     case PIXEL_TEST_SOFTWARE: {
       scoped_ptr<PixelTestSoftwareOutputDevice> software_output_device(
           new PixelTestSoftwareOutputDevice);
       software_output_device->set_surface_expansion_size(
           surface_expansion_size);
       output_surface = make_scoped_ptr(
@@ skipping 322 matching lines @@
 
   *texture_mailbox = TextureMailbox(mailbox, GL_TEXTURE_2D, sync_point);
   *release_callback = SingleReleaseCallback::Create(
       base::Bind(&LayerTreePixelTest::ReleaseTextureMailbox,
                  base::Unretained(this),
                  base::Passed(&context),
                  texture_id));
 }
 
 }  // namespace cc