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

chrome/test/ppapi/ppapi_test.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 CHROME_TEST_PPAPI_PPAPI_TEST_H_
 #define CHROME_TEST_PPAPI_PPAPI_TEST_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 22 matching lines @@
   std::string message_;
 
   DISALLOW_COPY_AND_ASSIGN(PPAPITestMessageHandler);
 };
 
 class PPAPITestBase : public InProcessBrowserTest {
  public:
   PPAPITestBase();
 
   // InProcessBrowserTest:
+  virtual void SetUp() OVERRIDE;
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE;
   virtual void SetUpOnMainThread() OVERRIDE;
 
   virtual std::string BuildQuery(const std::string& base,
                                  const std::string& test_case) = 0;
 
   // Returns the URL to load for file: tests.
   GURL GetTestFileUrl(const std::string& test_case);
   void RunTest(const std::string& test_case);
   // Run the test and reload. This can test for clean shutdown, including leaked
@@ skipping 121 matching lines @@
                                  const std::string& test_case) OVERRIDE;
 };
 
 class PPAPIBrokerInfoBarTest : public OutOfProcessPPAPITest {
  public:
   // PPAPITestBase override:
   virtual void SetUpOnMainThread() OVERRIDE;
 };
 
 #endif  // CHROME_TEST_PPAPI_PPAPI_TEST_H_