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..4716da962da2f663f0276aec6a96746a40bda0d0 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"
@@ -522,8 +521,7 @@ GLRenderingVDAClient::CreateDXVAVDA() {
 #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);

[piman, 2016/03/17 00:17:25]

Aren't we removing functionality here?

[Peng, 2016/03/17 14:22:31]

I didn't find any code sets this flag in code search. Probably it is fine.

[Peng, 2016/03/17 15:00:43]

Or we could define a duplicated const string variable in this file, what do you
think?

[DaleCurtis, 2016/03/17 17:43:22]

This was kept here to allow Intel and other manufacturers who are experimenting
with hardware VP8/VP9 decode to test their implementations. If we remove this,
it should be part of a larger cleanup to delete all of this code in favor of a
DXVA2 based decoder (since manufacturers seem to be leaning towards that instead
of MFT variants). +ananta

[DaleCurtis, 2016/03/17 18:42:18]

Whoops, just saw this is in the unittest. It's probably fine to delete this
here.

+    const bool enable_accelerated_vpx_decode = false;
     decoder.reset(new DXVAVideoDecodeAccelerator(
         base::Bind(&DoNothingReturnTrue),
         rendering_helper_->GetGLContext().get(),