Move non-browser specific ScreenshotTaker code to ui/snapshot.

ui/snapshot/snapshot.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'snapshot',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../skia/skia.gyp:skia',
         '../base/ui_base.gyp:ui_base',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
       ],
       'defines': [
         'SNAPSHOT_IMPLEMENTATION',
       ],
       'sources': [
+        'screenshot_taker.cc',
+        'screenshot_taker.h',
         'snapshot.h',
         'snapshot_android.cc',
         'snapshot_async.cc',
         'snapshot_async.h',
         'snapshot_aura.cc',
         'snapshot_export.h',
         'snapshot_ios.mm',
         'snapshot_mac.mm',
       ],
       'include_dirs': [
@@ skipping 51 matching lines @@
         # See http://crbug.com/162998#c4 for why this is needed.
         ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ],
 }