Introduce GpuVideoDecodeAcceleratorFactory.

gpu/config/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/ui.gni")
 
 declare_args() {
   # Use the PCI lib to collect GPU information on Linux.
   use_libpci = is_linux && !is_chromecast && (use_x11 || use_ozone)
 }
 
 group("config") {
   if (is_component_build) {
     public_deps = [
       "//gpu",
     ]
   } else {
     public_deps = [
       ":config_sources",
     ]
   }
 }
 
 source_set("config_sources") {
   visibility = [
     "//components/mus/gles2:*",
+    "//content/public/gpu/*",

[brettw, 2016/03/25 17:49:39]

For author and reviewers: this change was incorrect. The visibility here is to
prevent you from depending on this target, you should go through the "config"
target immediately above this or this code will get duplicated into multiple
modules in the component build.

I will add a better comment here, but adding things to visibility in other
modules should immediately set of alarm bells.

     "//gpu/*",
   ]
 
   sources = [
     "dx_diag_node.cc",
     "dx_diag_node.h",
     "gpu_blacklist.cc",
     "gpu_blacklist.h",
     "gpu_control_list.cc",
     "gpu_control_list.h",
@@ skipping 68 matching lines @@
       "//third_party/libXNVCtrl",
       "//ui/gfx/x",
     ]
   } else {
     sources -= [ "gpu_info_collector_x11.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "gpu_info_collector_ozone.cc" ]
   }
 }