Ensure GL initialization only happens once, and provide common init path

gpu/config/gpu_info_collector_unittest.cc

 // Copyright (c) 2012 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 "base/memory/scoped_ptr.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/config/gpu_info_collector.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_mock.h"
 
 using ::gfx::MockGLInterface;
 using ::testing::Return;
 
 namespace gpu {
 
 class GPUInfoCollectorTest : public testing::Test {
  public:
   GPUInfoCollectorTest() {}
   virtual ~GPUInfoCollectorTest() { }
 
   virtual void SetUp() {
-    // TODO(kbr): make this setup robust in the case where
-    // GLSurface::InitializeOneOff() has already been called by
-    // another unit test. http://crbug.com/100285
-    gfx::SetGLGetProcAddressProc(gfx::MockGLInterface::GetGLProcAddress);
-    gfx::InitializeStaticGLBindings(gfx::kGLImplementationMockGL);
     gl_.reset(new ::testing::StrictMock< ::gfx::MockGLInterface>());
     ::gfx::MockGLInterface::SetGLInterface(gl_.get());
 #if defined(OS_WIN)
     const uint32 vendor_id = 0x10de;
     const uint32 device_id = 0x0658;
     const char* driver_vendor = "";  // not implemented
     const char* driver_version = "";
     const char* shader_version = "1.40";
     const char* gl_version = "3.1";
     const char* gl_renderer = "Quadro FX 380/PCI/SSE2";
@@ skipping 139 matching lines @@
 
 TEST_F(GPUInfoCollectorTest, DISABLED_GLExtensionsGL) {
   GPUInfo gpu_info;
   CollectGraphicsInfoGL(&gpu_info);
   EXPECT_EQ(test_values_.gl_extensions,
             gpu_info.gl_extensions);
 }
 
 }  // namespace gpu