Allow textures to be moved from one GL context group to another.

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
===================================================================
--- gpu/command_buffer/build_gles2_cmd_buffer.py	(revision 134729)
+++ gpu/command_buffer/build_gles2_cmd_buffer.py	(working copy)
@@ -862,6 +862,15 @@
     'gl_test_func': 'glClearDepth',
   },
   'ColorMask': {'decoder_func': 'DoColorMask', 'expectation': False},
+  'ConsumeTextureCHROMIUM': {
+    'decoder_func': 'DoConsumeTextureCHROMIUM',
+    'type': 'PUT',
+    'data_type': 'GLbyte',
+    'count': 64,
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
   'ClearStencil': {'decoder_func': 'DoClearStencil'},
   'EnableFeatureCHROMIUM': {
     'type': 'Custom',
@@ -988,6 +997,15 @@
     'resource_type': 'Buffer',
     'resource_types': 'Buffers',
   },
+  'GenMailboxCHROMIUM': {
+    'type': 'Manual',
+    'cmd_args': 'GLuint bucket_id',
+    'result': ['SizedResult<GLint>'],
+    'client_test': False,
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
   'GenFramebuffers': {
     'type': 'GENn',
     'gl_test_func': 'glGenFramebuffersEXT',
@@ -1278,6 +1296,15 @@
       'extension': True,
       'chromium': True,
   },
+  'ProduceTextureCHROMIUM': {
+    'decoder_func': 'DoProduceTextureCHROMIUM',
+    'type': 'PUT',
+    'data_type': 'GLbyte',
+    'count': 64,
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
   'RenderbufferStorage': {
     'decoder_func': 'DoRenderbufferStorage',
     'gl_test_func': 'glRenderbufferStorageEXT',