Add slice tool

gyp/tools.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.
     # GYP file to build various tools.
 #
 # To build on Linux:
 #  ./gyp_skia tools.gyp && make tools
 #
 {
@@ skipping 18 matching lines @@
         'imgconv',
         'pinspect',
         'render_pdfs',
         'render_pictures',
         'skdiff',
         'skhello',
         'skp2svg',
         'skpdiff',
         'skpinfo',
         'skpmaker',
+        'imgslice',
         'test_image_decoder',
         'test_public_includes',
         'whitelist_typefaces',
       ],
       'conditions': [
         ['skia_shared_lib',
           {
             'dependencies': [
               'sklua', # This can only be built if skia is built as a shared library
             ],
@@ skipping 254 matching lines @@
       'include_dirs': [
         '../include/private',
         '../src/core/',
       ],
       'dependencies': [
         'flags.gyp:flags',
         'skia_lib.gyp:skia_lib',
       ],
     },
     {
+      'target_name': 'imgslice',
+      'type': 'executable',
+      'sources': [
+        '../tools/imgslice.cpp',
+      ],
+      'include_dirs': [
+        '../include/core',
+      ],
+      'dependencies': [
+        'flags.gyp:flags',
+        'skia_lib.gyp:skia_lib',
+      ],
+    },
+    {
       'target_name': 'flatten',
       'type': 'executable',
       'sources': [
         '../tools/flatten.cpp',
       ],
       'dependencies': [
         'skia_lib.gyp:skia_lib',
       ],
     },
     {
@@ skipping 514 matching lines @@
               'flags.gyp:flags',
               'skia_lib.gyp:skia_lib',
               'resources',
             ],
           },
         ],
       },
     ],
   ],
 }