(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

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 34 matching lines @@
           new PixelTestSoftwareOutputDevice);
       software_output_device->set_surface_expansion_size(
           surface_expansion_size);
       output_surface = make_scoped_ptr(
           new PixelTestOutputSurface(software_output_device.Pass()));
       break;
     }
     case PIXEL_TEST_GL: {
       bool flipped_output_surface = false;
       output_surface = make_scoped_ptr(new PixelTestOutputSurface(
-          new TestInProcessContextProvider, flipped_output_surface));
+          new TestInProcessContextProvider, nullptr, flipped_output_surface));
       break;
     }
   }
 
   output_surface->set_surface_expansion_size(surface_expansion_size);
   return output_surface.Pass();
 }
 
 void LayerTreePixelTest::CommitCompleteOnThread(LayerTreeHostImpl* impl) {
   LayerTreeImpl* commit_tree =
@@ skipping 305 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