Move SkGLContext and some GrGLInterface implementations to skgputest module

gyp/dm.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 for "dm" (Diamond Master, a.k.a Dungeon master, a.k.a GM 2).
 {
     'includes': [ 'apptype_console.gypi' ],
 
     'targets': [{
         'target_name': 'dm',
         'type': 'executable',
         'includes': [
           'dm.gypi',
         ],
         'conditions': [
           ['skia_android_framework', {
               'libraries': [
                   'skia_static.a',
                   'hwui_static.a',
               ],
               'sources': [
                 '../dm/DMSrcSinkAndroid.cpp',
               ],
               'dependencies': [
                 'tools.gyp:android_utils',
               ],
           }],
+          ['skia_gpu', {
+              'dependencies': [
+                'gputest.gyp:skgputest',
+              ],
+          }],
         ],
     }]
 }