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

webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp

Index: webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp
===================================================================
--- webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp	(revision 35153)
+++ webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp	(working copy)
@@ -16,6 +16,9 @@
         ['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',
@@ -23,6 +26,8 @@
         }]
       ],
       'sources': [
+        'command_buffer_pepper.cc',
+        'command_buffer_pepper.h',
         'main.cc',
         'plugin_object.cc',
         'plugin_object.h',
@@ -32,11 +37,11 @@
         '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',
         ],