Use stub GL draw/clear calls for browser tests that do not need pixels.

content/public/test/browser_test_base.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_TEST_BROWSER_TEST_BASE_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_BASE_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/threading/thread.h"
@@ skipping 104 matching lines @@
 
   // When the test is running in --single-process mode, runs the given task on
   // the in-process renderer thread. A nested message loop is run until it
   // returns.
   void PostTaskToInProcessRendererAndWait(const base::Closure& task);
 
   // Call this before SetUp() to use real GL contexts in Compositor for the
   // test.
   void UseRealGLContexts();
 
-  // Call this before SetUp() to use real GL drivers instead of OSMesa for the
-  // test.
-  void UseRealGLBindings();
-
   // Call this before SetUp() to not use GL, but use software compositing
   // instead.
   void UseSoftwareCompositing();
 
   // Returns true if the test will be using GL acceleration via OSMesa.
   bool UsingOSMesa() const;
 
  private:
   void ProxyRunTestOnMainThreadLoop();
 
   // Testing server, started on demand.
   scoped_ptr<net::SpawnedTestServer> test_server_;
 
   // Embedded test server, cheap to create, started on demand.
   scoped_ptr<net::test_server::EmbeddedTestServer> embedded_test_server_;
 
   // Host resolver used during tests.
   scoped_refptr<net::RuleBasedHostResolverProc> rule_based_resolver_;
 
   // When false, the ui::Compositor will be forced to use real GL contexts for
   // the test, so that it produces real pixel output.
   bool allow_test_contexts_;
 
-  // When false, the GL backend will use a real GPU. When true, it uses OSMesa
-  // to run GL on the CPU in a way that works across all platforms.
-  bool allow_osmesa_;
-
   // When true, do compositing with the software backend instead of using GL.
   bool use_software_compositing_;
 
 #if defined(OS_POSIX)
   bool handle_sigterm_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_BASE_H_