Add subscribeUniform extension pipeline

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
diff --git a/gpu/command_buffer/build_gles2_cmd_buffer.py b/gpu/command_buffer/build_gles2_cmd_buffer.py
index 14c778a4ea8af2b0b52fdc27e3c1eb527b8bef91..06a35f51307b71ee449882e7b1b96081fdb6193d 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -1195,6 +1195,12 @@ _NAMED_TYPE_INFO = {
       'GL_SCANOUT_CHROMIUM'
     ],
   },
+  'UniformSubscriptionTarget': {
+    'type': 'GLenum',
+    'valid': [
+      'GL_MOUSE_POSITION_CHROMIUM',
+    ],
+  },
   'VertexAttribType': {
     'type': 'GLenum',
     'valid': [
@@ -1448,6 +1454,26 @@ _FUNCTION_INFO = {
     'extension': "CHROMIUM_texture_mailbox",
     'chromium': True,
   },
+  'SubscribeUniformCHROMIUM': {
+    'decoder_func': 'DoSubscribeUniformCHROMIUM',
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
+  'UnsubscribeUniformCHROMIUM': {
+    'decoder_func': 'DoUnsubscribeUniformCHROMIUM',
+    'unit_test': False,
+    'extension': True,
+    'chromium': True,
+  },
+  'PopulateSubscribedUniformsCHROMIUM': {
+    'decoder_func': 'DoPopulateSubscribedUniformsCHROMIUM',
+    'impl_func': False,

[piman, 2014/10/23 02:30:48]

nit: why not?

+    'unit_test': False,
+    'client_test': False,
+    'extension': True,
+    'chromium': True,
+  },
   'ClearStencil': {
     'type': 'StateSet',
     'state': 'ClearStencil',