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

content/public/test/unittest_test_suite.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 "content/public/test/unittest_test_suite.h"
 
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "base/test/test_suite.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/web/WebKit.h"
+#include "ui/gl/gl_surface.h"
 
 namespace content {
 
 #if !defined(OS_IOS)
 // A stubbed out WebKit platform support impl.
 class UnitTestTestSuite::UnitTestWebKitPlatformSupport
     : public blink::Platform {
  public:
   UnitTestWebKitPlatformSupport() {}
   virtual ~UnitTestWebKitPlatformSupport() {}
   virtual void cryptographicallyRandomValues(unsigned char* buffer,
                                              size_t length) OVERRIDE {
     base::RandBytes(buffer, length);
   }
   virtual const unsigned char* getTraceCategoryEnabledFlag(
       const char* categoryName) {
     // Causes tracing macros to be disabled.
     static const unsigned char kEnabled = 0;
     return &kEnabled;
   }
 };
 #endif  // !OS_IOS
 
 UnitTestTestSuite::UnitTestTestSuite(base::TestSuite* test_suite)
     : test_suite_(test_suite) {
   DCHECK(test_suite);
 #if !defined(OS_IOS)
+  gfx::GLSurface::InitializeOneOffForTests();
+
   webkit_platform_support_.reset(new UnitTestWebKitPlatformSupport);
   blink::initialize(webkit_platform_support_.get());
 #endif
 }
 
 UnitTestTestSuite::~UnitTestTestSuite() {
 #if !defined(OS_IOS)
   blink::shutdown();
 #endif
 }
 
 int UnitTestTestSuite::Run() {
   return test_suite_->Run();
 }
 
 }  // namespace content