media: Pare MCVD down to a minimal media::VideoDecoder

media/gpu/BUILD.gn

 # Copyright 2016 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/gpu/args.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
+declare_args() {
+  # A temporary arg for building MCVD while it's being implemented.
+  # See http://crbug.com/660942
+  enable_media_codec_video_decoder = false
+}
+
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
 }
 
 if (is_chromeos && current_cpu != "arm") {
   action("libva_generate_stubs") {
     extra_header = "va_stub_header.fragment"
 
     script = "../../tools/generate_stubs/generate_stubs.py"
     sources = [
@@ skipping 162 matching lines @@
     ]
 
     if (enable_webrtc) {
       deps += [ "//third_party/libyuv" ]
       sources += [
         "android_video_encode_accelerator.cc",
         "android_video_encode_accelerator.h",
       ]
     }
 
+    if (enable_media_codec_video_decoder) {
+      sources += [
+        "android/media_codec_video_decoder.cc",
+        "android/media_codec_video_decoder.h",
+      ]
+    }
+
     # TODO(xhwang): This is needed for AVDA to access the CDM directly.
     # Remove this dependency after VDAs are also running as part of the mojo
     # media service. See http://crbug.com/522298
     if (mojo_media_host == "gpu") {
       deps += [ "//media/mojo/services" ]
     }
   }
 
   if (is_chromeos || is_win) {
     sources += [
@@ skipping 205 matching lines @@
   }
 }
 
 source_set("android_video_decode_accelerator_unittests") {
   if (is_android) {
     testonly = true
     sources = [
       "android_video_decode_accelerator_unittest.cc",
       "avda_codec_allocator_unittest.cc",
     ]
+    if (enable_media_codec_video_decoder) {
+      sources += [ "android/media_codec_video_decoder_unittest.cc" ]
+    }
     deps = [
       ":gpu",
       "//base/test:test_support",
       "//gpu:test_support",
       "//media/base/android",
       "//testing/gmock",
       "//testing/gtest",
     ]
   }
 }
@@ skipping 57 matching lines @@
       "video_accelerator_unittest_helpers.h",
     ]
     if (use_x11) {
       deps += [ "//ui/gfx/x" ]
     }
     if (use_ozone) {
       deps += [ "//ui/ozone" ]
     }
   }
 }