Add use_v4l2_codec use flag to include v4l2 codec on x86 CrOS.

content/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.

[wuchengli, 2015/01/08 11:16:46]

Explain in the change description why we are doing this.

[henryhsu, 2015/01/08 12:11:19]

Done.

 # 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("//content/common/common.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 if (is_chromeos && cpu_arch != "arm") {
   action("libva_generate_stubs") {
@@ skipping 262 matching lines @@
       "gpu/media/android_video_decode_accelerator.cc",
       "gpu/media/android_video_decode_accelerator.h",
     ]
 
     if (enable_webrtc) {
       deps += [ "//third_party/libyuv" ]
     }
   }
 
   if (is_chromeos) {
-    if (cpu_arch == "arm" && use_x11) {
+    if ((cpu_arch == "arm" && use_x11) || use_v4l2_codec) {
       sources += [
         "gpu/media/exynos_v4l2_video_device.cc",

[wuchengli, 2015/01/08 11:16:46]

Change this to generic_v4l2_video_device.cc.

[henryhsu, 2015/01/08 12:11:19]

Done.

         "gpu/media/exynos_v4l2_video_device.h",
-        "gpu/media/tegra_v4l2_video_device.cc",
-        "gpu/media/tegra_v4l2_video_device.h",
         "gpu/media/v4l2_image_processor.cc",
         "gpu/media/v4l2_image_processor.h",
         "gpu/media/v4l2_video_decode_accelerator.cc",
         "gpu/media/v4l2_video_decode_accelerator.h",
         "gpu/media/v4l2_video_device.cc",
         "gpu/media/v4l2_video_device.h",
         "gpu/media/v4l2_video_encode_accelerator.cc",
         "gpu/media/v4l2_video_encode_accelerator.h",
       ]
       libs = [
         "EGL",
         "GLESv2",
       ]
+      if (cpu_arch == "arm") {
+        sources += [
+          "gpu/media/tegra_v4l2_video_device.cc",
+          "gpu/media/tegra_v4l2_video_device.h",
+        ]
+      }
     }
     if (cpu_arch != "arm") {
       sources += [
                    "gpu/media/h264_dpb.cc",
                    "gpu/media/h264_dpb.h",
                    "gpu/media/va_surface.h",
                    "gpu/media/vaapi_h264_decoder.cc",
                    "gpu/media/vaapi_h264_decoder.h",
                    "gpu/media/vaapi_picture.cc",
                    "gpu/media/vaapi_picture.h",
@@ skipping 76 matching lines @@
     "geolocation_service.mojom",
     "permission_service.mojom",
     "render_frame_setup.mojom",
   ]
 
   deps = [
     "//content/public/common:mojo_bindings",
     "//mojo/public/interfaces/application:application",
   ]
 }