Call libyuv for short->half-float conversion

cc/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/ui.gni")
 import("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
@@ skipping 565 matching lines @@
     "//skia",
   ]
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc/proto",
     "//cc/surfaces:surface_id",
     "//gpu",
     "//gpu/command_buffer/client:gles2_interface",
     "//media",
+    "//third_party/libyuv",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
   defines = [ "CC_IMPLEMENTATION=1" ]
 
   if (!is_debug && (is_win || is_android)) {
     configs -= [ "//build/config/compiler:default_optimization" ]
@@ skipping 464 matching lines @@
     "//ui/gl:test_support",
   ]
 
   # This target should not require the Chrome executable to run.
   assert_no_deps = [ "//chrome" ]
 
   data = [
     "test/data/",
   ]
 }