Revert of content gpu refactor: get rid of gpu related content switches.

content/common/gpu/media/vt_video_decode_accelerator_mac.cc

 // Copyright 2014 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 <algorithm>
 
 #include <CoreVideo/CoreVideo.h>
 #include <OpenGL/CGLIOSurface.h>
 #include <OpenGL/gl.h>
 #include <stddef.h>
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/sys_byteorder.h"
 #include "base/sys_info.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/version.h"
 #include "content/common/gpu/media/vt_video_decode_accelerator_mac.h"
+#include "content/public/common/content_switches.h"
 #include "media/base/limits.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_image_io_surface.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/scoped_binders.h"
 
 using content_common_gpu_media::kModuleVt;
 using content_common_gpu_media::InitializeStubs;
 using content_common_gpu_media::IsVtInitialized;
 using content_common_gpu_media::StubPathMap;
@@ skipping 138 matching lines @@
   return true;
 }
 
 // The purpose of this function is to preload the generic and hardware-specific
 // libraries required by VideoToolbox before the GPU sandbox is enabled.
 // VideoToolbox normally loads the hardware-specific libraries lazily, so we
 // must actually create a decompression session. If creating a decompression
 // session fails, hardware decoding will be disabled (Initialize() will always
 // return false).
 static bool InitializeVideoToolboxInternal() {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableAcceleratedVideoDecode)) {
+    return false;
+  }
+
   if (!IsVtInitialized()) {
     // CoreVideo is also required, but the loader stops after the first path is
     // loaded. Instead we rely on the transitive dependency from VideoToolbox to
     // CoreVideo.
     StubPathMap paths;
     paths[kModuleVt].push_back(FILE_PATH_LITERAL(
         "/System/Library/Frameworks/VideoToolbox.framework/VideoToolbox"));
     if (!InitializeStubs(paths)) {
       LOG(WARNING) << "Failed to initialize VideoToolbox framework. "
                    << "Hardware accelerated video decoding will be disabled.";
@@ skipping 967 matching lines @@
     SupportedProfile profile;
     profile.profile = supported_profile;
     profile.min_resolution.SetSize(16, 16);
     profile.max_resolution.SetSize(4096, 2160);
     profiles.push_back(profile);
   }
   return profiles;
 }
 
 }  // namespace content