Removed --use-gl=osmesa as default for ui and browser tests....

chrome/test/gpu/gpu_browsertest.cc

 // Copyright (c) 2010 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 "app/gfx/gl/gl_implementation.h"
+#include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_paths.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/test/in_process_browser_test.h"
+#include "chrome/test/test_launcher_utils.h"
 #include "chrome/test/ui_test_utils.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 
 class GPUBrowserTest : public InProcessBrowserTest {
  protected:
   GPUBrowserTest() {
   }
 
   virtual void SetUpInProcessBrowserTestFixture() {
     FilePath test_dir;
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_dir));
     gpu_test_dir_ = test_dir.AppendASCII("gpu");
   }
 
+  virtual void SetUpCommandLine(CommandLine* command_line) {
+    InProcessBrowserTest::SetUpCommandLine(command_line);
+
+    EXPECT_TRUE(test_launcher_utils::OverrideGLImplementation(
+        command_line,
+        gfx::kGLImplementationOSMesaName));
+
+#if defined(OS_MACOSX)
+    // Accelerated compositing does not work with OSMesa. AcceleratedSurface
+    // assumes GL contexts are native.
+    command_line->AppendSwitch(switches::kDisableAcceleratedCompositing);
+#endif
+  }
+
   FilePath gpu_test_dir_;
 };
 
-IN_PROC_BROWSER_TEST_F(GPUBrowserTest, BrowserTestLaunchedWithOSMesa) {
+IN_PROC_BROWSER_TEST_F(GPUBrowserTest, BrowserTestCanLaunchWithOSMesa) {
   // Check the webgl test reports success and that the renderer was OSMesa.
-  // We use OSMesa for tests in order to get consistent results across a
-  // variety of boxes.
   ui_test_utils::NavigateToURL(
       browser(),
       net::FilePathToFileURL(gpu_test_dir_.AppendASCII("webgl.html")));
 
   EXPECT_EQ(ASCIIToUTF16("SUCCESS: Mesa OffScreen"),
             browser()->GetSelectedTabContents()->GetTitle());
 }