cc: Use the correct internal format for glCopyTexImage2D calls.

cc/test/test_in_process_context_provider.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/test_in_process_context_provider.h"
 
 #include <stdint.h>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
@@ skipping 14 matching lines @@
 
 namespace cc {
 
 // static
 std::unique_ptr<gpu::GLInProcessContext> CreateTestInProcessContext(
     TestGpuMemoryBufferManager* gpu_memory_buffer_manager,
     TestImageFactory* image_factory,
     gpu::GLInProcessContext* shared_context) {
   const bool is_offscreen = true;
   gpu::gles2::ContextCreationAttribHelper attribs;
-  attribs.alpha_size = 8;
-  attribs.blue_size = 8;
-  attribs.green_size = 8;
-  attribs.red_size = 8;
+  attribs.alpha_size = -1;
   attribs.depth_size = 24;
   attribs.stencil_size = 8;
   attribs.samples = 0;
   attribs.sample_buffers = 0;
   attribs.fail_if_major_perf_caveat = false;
   attribs.bind_generates_resource = false;
   gl::GpuPreference gpu_preference = gl::PreferDiscreteGpu;
 
   std::unique_ptr<gpu::GLInProcessContext> context =
       base::WrapUnique(gpu::GLInProcessContext::Create(
@@ skipping 66 matching lines @@
 
 void TestInProcessContextProvider::DeleteCachedResources() {
   if (gr_context_)
     gr_context_->FreeGpuResources();
 }
 
 void TestInProcessContextProvider::SetLostContextCallback(
     const LostContextCallback& lost_context_callback) {}
 
 }  // namespace cc