Added Pepper 3D render context that instantiates the GPU plugin....

webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp

 
 {
   'targets': [
     {
       'target_name': 'pepper_test_plugin',
       'type': 'shared_library',
       'dependencies': [
         '../../../base/base.gyp:base',
         '../../../skia/skia.gyp:skia',
         '../../../third_party/npapi/npapi.gyp:npapi',
       ],
       'include_dirs': [
         '../../..',  # Root of Chrome Checkout
       ],
       'conditions': [
         ['OS=="win"', {
           'product_name': 'pepper_test_plugin',
           'msvs_guid': 'EE00E36E-9E8C-4DFB-925E-FBE32CEDB91A',
+          'dependencies': [
+            '../../../gpu/gpu.gyp:gles2_demo_lib',
+          ],
           'sources': [
             'pepper_test_plugin.def',
             'pepper_test_plugin.rc',
           ],
         }]
       ],
       'sources': [
+        'command_buffer_pepper.cc',
+        'command_buffer_pepper.h',
         'main.cc',
         'plugin_object.cc',
         'plugin_object.h',
         'test_object.cc',
         'test_object.h',
         'event_handler.cc',
         'event_handler.h'
       ],
       'run_as': {
-        'working_directory': '.',
         'action': [
           '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)chrome<(EXECUTABLE_SUFFIX)',
           '--no-sandbox',
           '--internal-pepper',
+          '--enable-gpu-plugin',
           '--load-plugin=$(TargetPath)',
           'file://$(ProjectDir)test_page.html',
         ],
       },
     }
   ],
 }