Revert of command_buffer: Enable gl path rendering by default

gpu/command_buffer/tests/gl_chromium_framebuffer_mixed_samples_unittest.cc

 // Copyright (c) 2015 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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 #include <stdint.h>
 #include <string.h>
 
 #include "base/command_line.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #define SHADER(Src) #Src
 
 namespace gpu {
 
 class CHROMIUMFramebufferMixedSamplesTest : public testing::Test {
  protected:
   const GLuint kWidth = 100;
   const GLuint kHeight = 100;
 
   void SetUp() override {
-    gl_.Initialize(GLManager::Options());
+    base::CommandLine command_line(*base::CommandLine::ForCurrentProcess());
+    command_line.AppendSwitch(switches::kEnableGLPathRendering);
+    gl_.InitializeWithCommandLine(GLManager::Options(), &command_line);
   }
 
   void TearDown() override { gl_.Destroy(); }
 
   bool IsApplicable() const {
     return GLTestHelper::HasExtension(
                "GL_CHROMIUM_framebuffer_mixed_samples") &&
            GLTestHelper::HasExtension("GL_OES_rgb8_rgba8");
   }
 
@@ skipping 195 matching lines @@
                  results[pass].get());
   }
 
   EXPECT_NE(0, memcmp(results[0].get(), results[1].get(), kResultSize));
   // Verify that rendering is deterministic, so that the pass above does not
   // come from non-deterministic rendering.
   EXPECT_EQ(0, memcmp(results[0].get(), results[2].get(), kResultSize));
 }
 
 }  // namespace gpu