Remove content switches dependency in content/common/gpu.

content/common/gpu/media/video_decode_accelerator_unittest.cc

Index: content/common/gpu/media/video_decode_accelerator_unittest.cc
diff --git a/content/common/gpu/media/video_decode_accelerator_unittest.cc b/content/common/gpu/media/video_decode_accelerator_unittest.cc
index 78ea8ba2c6d564e509b452686c0607a1b8d6ecff..fbd5fb4a5f765acd485183786ff0457bc49a68a0 100644
--- a/content/common/gpu/media/video_decode_accelerator_unittest.cc
+++ b/content/common/gpu/media/video_decode_accelerator_unittest.cc
@@ -49,7 +49,6 @@
 #include "content/common/gpu/media/fake_video_decode_accelerator.h"
 #include "content/common/gpu/media/rendering_helper.h"
 #include "content/common/gpu/media/video_accelerator_unittest_helpers.h"
-#include "content/public/common/content_switches.h"
 #include "media/filters/h264_parser.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/codec/png_codec.h"
@@ -521,9 +520,7 @@ GLRenderingVDAClient::CreateDXVAVDA() {
   scoped_ptr<media::VideoDecodeAccelerator> decoder;
 #if defined(OS_WIN)
   if (base::win::GetVersion() >= base::win::VERSION_WIN7) {
-    const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
-    const bool enable_accelerated_vpx_decode =
-        cmd_line->HasSwitch(switches::kEnableAcceleratedVpxDecode);
+    const bool enable_accelerated_vpx_decode = false;

[Pawel Osciak, 2016/03/18 01:56:57]

Removing this may prevent us from testing this feature I believe. I'm not the
owner of DXVA, but this is perhaps needed?

[Peng, 2016/03/18 15:16:44]

Do we need pass the --enable-accelerated-vpx-decode to this unit test manually?
If not, I think the change is OK. I think it is not hard to test DXVAVDA decoder
with both vpx enabled and disabled. Just need make the
enable_accelerated_vpx_decode as an argument, and call this function twice with
different bool values. But seems we are not testing the DXVAV decoder with vpx
enabled right now, so I didn't do it. But we could do it when it is needed.
Thought?

     decoder.reset(new DXVAVideoDecodeAccelerator(
         base::Bind(&DoNothingReturnTrue),
         rendering_helper_->GetGLContext().get(),