Start work on GN build for content/common

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
 # In GN, a "group" is a dummy target that just lists other targets.
 group("root") {
   # Note that some dependencies are commented out. These are things that are
   # currently written but not hooked up to the build yet. They may need to be
   # completed or possibly just tested and then re-enabled.
   deps = [
     # This is a temporary test of the not-yet-complete NaCl cross-compilation.
     #"//base(//build/toolchain/nacl:x86_newlib)",
 
     "//apps/common/api:apps_api",
     #"//chrome",
     "//components/language_usage_metrics",
     "//components/metrics",
     "//components/navigation_metrics",
     "//components/onc",
     "//components/os_crypt",
     "//components/startup_metric_utils",
     "//components/resources:components_resources",
+    "//components/tracing",
     "//components/translate:translate_core_browser",
     "//components/translate:translate_core_common",
     "//components/url_matcher",
     "//crypto",
     "//device/usb",
     #"//extensions/common/api:extensions_api",
     "//gpu/command_buffer/client",
     "//ipc",
     "//mojo",
     "//net",
@@ skipping 13 matching lines @@
     "//third_party/smhasher:cityhash",
     "//third_party/smhasher:murmurhash3",
     "//third_party/smhasher:pmurhash",
     # TODO(brettw) re-enable once the unused variables in this .gn file are
     # fixed and rolled into Chrome.
     #"//third_party/WebKit/Source/platform",
     "//third_party/WebKit/Source/wtf",
     "//third_party/zlib",
     "//third_party:jpeg",
     "//tools/gn",
+    "//ui/accessibility",
     "//ui/base:ui_base",
     "//ui/events",
     "//ui/gfx",
     "//ui/resources",
     "//ui/strings",
     "//ui/surface",
     "//url",
   ]
 
   if (is_linux) {
     deps += [
       "//third_party/freetype2",
     ]
   }
 
   if (is_android) {
     deps -= [
       "//components/os_crypt",
       "//crypto",
       "//gpu/command_buffer/client",  # Needs Skia.
       "//net",
       "//third_party/libusb",
       #"//third_party/WebKit/Source/platform",
       "//third_party/WebKit/Source/wtf",  # TODO(brettw) re-enable for Android.
       "//tools/gn",
+
+      # This UI stuff is blocked on Skia.
+      "//ui/accessibility",
       "//ui/base:ui_base",
       "//ui/events",
       "//ui/gfx",
-      "//ui/surface",  # TODO(brettw): Skia does not build on Android yet.
-                       # Re-enable this when skia is fixed.
+      "//ui/surface",
     ]
   }
 }