Add GN buildfiles for ui/compositor and snapshot.

content/common/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/features.gni")
 import("//build/config/ui.gni")
 import("//content/common/common.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 source_set("common") {
@@ skipping 15 matching lines @@
 
   deps = [
     "//base",
     "//build/util:webkit_version",
     "//components/tracing",
     "//gpu/command_buffer/common",
     "//net",
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
-    "//ui/base:ui_base",
+    "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
     "//third_party/WebKit/public:blink_headers",
     # TODO(GYP) convert these dependencies.
     #'../third_party/libjingle/libjingle.gyp:libjingle',
     #'../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
   ]
 
   if (!is_ios) {
@@ skipping 213 matching lines @@
       ]
     }
   }
 }
 
 mojom("mojo_bindings") {
   sources = [
     "web_ui_setup.mojom",
   ]
 }