Use new jpeg_crop_scanlines() API to optimize jpeg subset decodes

gyp/codec.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # GYP file for codec project.
@@ skipping 66 matching lines @@
         # appropriate version of libjpeg-turbo is present.      
         'TURBO_HAS_SKIP',
         'TURBO_HAS_565',
       ],
       'conditions': [
         ['skia_codec_decodes_raw', {
           'dependencies': [
             'raw_codec',
           ],
         },],
+        ['skia_android_framework == 0', {
+          'defines': [
+            # TODO (msarett): Add this optimization to Android.

[scroggo, 2016/02/22 15:55:03]

Do you have a (NYC triaged) bug open for Android? Reference it here?

[msarett, 2016/02/22 17:38:16]

Just opened one.  Done.

+            'TURBO_HAS_CROP',
+          ],
+        },],
       ],
     }, {
       # RAW codec needs exceptions. Due to that, it is a separate target. Its usage can be
       # controlled by skia_codec_decodes_raw flag.
       'target_name': 'raw_codec',
       'product_name': 'raw_codec',
       'type': 'static_library',
       'dependencies': [
         'core.gyp:*',
         'dng_sdk.gyp:dng_sdk-selector',
@@ skipping 34 matching lines @@
         ['skia_os == "ios" or skia_os == "mac"', {
           'xcode_settings': {
             'OTHER_CFLAGS': ['-fexceptions'],
             'OTHER_CPLUSPLUSFLAGS': ['-fexceptions'],
           },
         }],
       ],
     },
   ],
 }