aura: Use platform independent skia::PlatformCanvas when possible.

skia/skia.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.
 
 {
   'targets': [
     {
       'target_name': 'skia',
       'type': '<(component)',
       'variables': {
@@ skipping 694 matching lines @@
         'ext/convolver.cc',
         'ext/convolver.h',
         'ext/google_logging.cc',
         'ext/image_operations.cc',
         'ext/image_operations.h',
         'ext/SkThread_chrome.cc',
         'ext/platform_canvas.cc',
         'ext/platform_canvas.h',
         'ext/platform_canvas_linux.cc',
         'ext/platform_canvas_mac.cc',
+        'ext/platform_canvas_skia.cc',
         'ext/platform_canvas_win.cc',
         'ext/platform_device.cc',
         'ext/platform_device.h',
         'ext/platform_device_linux.cc',
         'ext/platform_device_mac.cc',
         'ext/platform_device_win.cc',
         'ext/SkMemory_new_handler.cpp',
         'ext/skia_sandbox_support_win.h',
         'ext/skia_sandbox_support_win.cc',
         'ext/skia_utils_mac.mm',
@@ skipping 123 matching lines @@
             '../third_party/skia/src/ports/SkFontHost_tables.cpp',
           ],
         }],
         [ 'OS == "android"', {
           'sources/': [
             ['exclude', '_linux\\.(cc|cpp)$'],
             ['include', 'ext/platform_device_linux\\.cc$'],
             ['include', 'ext/platform_canvas_linux\\.cc$'],
           ],
         }],
+        [ 'use_aura == 1 and use_canvas_skia == 1', {
+          'sources/': [
+            ['exclude', 'ext/platform_canvas_mac\\.cc$'],
+            ['exclude', 'ext/platform_canvas_linux\\.cc$'],
+            ['exclude', 'ext/platform_canvas_win\\.cc$'],
+          ],
+        }, { # use_aura == 0 and use_canvas_skia == 1
+          'sources/': [ ['exclude', 'ext/platform_canvas_skia\\.cc$'] ],
+        }],
         [ 'toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:gdk',
           ],
         }, {  # toolkit_uses_gtk == 0
           'sources/': [ ['exclude', '_gtk\\.(cc|cpp)$'] ],
         }],
         [ 'OS == "android"', {
           'defines': [
             'SK_BUILD_FOR_ANDROID_NDK',
@@ skipping 372 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'ext/image_operations_bench.cc',
       ],
     },
   ],
 }