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

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

Index: chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc
diff --git a/chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc b/chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc
index 7573bd0bd2655c9ac666422c683e3ed508169c44..340c4de8befac0928830d1b8dde4fdc10bfa5d73 100644
--- a/chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc
+++ b/chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc
@@ -34,29 +34,20 @@ const char kExtensionId[] = "ddchlicdkolnonkihahngkmmmjnjlkkf";
 
 class TabCaptureApiTest : public ExtensionApiTest {
  public:
-  TabCaptureApiTest() {}
-
-  virtual void SetUp() OVERRIDE {
-    // TODO(danakj): The GPU Video Decoder needs real GL bindings.
-    // crbug.com/269087
-    UseRealGLBindings();
-
-    // These test should be using OSMesa on CrOS, which would make this
-    // unneeded.
-    // crbug.com/313128
-#if !defined(OS_CHROMEOS)
-    UseRealGLContexts();
-#endif
-
-    ExtensionApiTest::SetUp();
-  }
-
   void AddExtensionToCommandLineWhitelist() {
     CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kWhitelistedExtensionID, kExtensionId);
   }
 };
 
+class TabCaptureApiPixelTest : public TabCaptureApiTest {
+ public:
+  virtual void SetUp() OVERRIDE {
+    UseRealGLContexts();
+    TabCaptureApiTest::SetUp();
+  }
+};
+
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, ApiTests) {
@@ -96,7 +87,7 @@ IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, ApiTestsAudio) {
 #else
 #define MAYBE_EndToEnd EndToEnd
 #endif
-IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, MAYBE_EndToEnd) {
+IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, MAYBE_EndToEnd) {
 #if defined(OS_WIN)
   // TODO(justinlin): Disabled for WinXP due to timeout issues.
   if (base::win::GetVersion() < base::win::VERSION_VISTA) {