Handle CompressedTex{Sub}Image{2|3}D interaction with PBO.

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 30ac3c8d90d02d358858ac0c9d48c074ced12246..8bfc500ef41a4434c9be99d2ec6ae48c5cd798ec 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -2608,9 +2608,8 @@ _FUNCTION_INFO = {
     'trace_level': 1,
   },
   'CompressedTexSubImage2D': {
-    'type': 'Data',
+    'type': 'Custom',
     'data_transfer_methods': ['bucket', 'shm'],
-    'decoder_func': 'DoCompressedTexSubImage2D',
     'trace_level': 1,
   },
   'CopyTexImage2D': {
@@ -2625,16 +2624,14 @@ _FUNCTION_INFO = {
     'trace_level': 1,
   },
   'CompressedTexImage3D': {
-    'type': 'Data',
+    'type': 'Custom',
     'data_transfer_methods': ['bucket', 'shm'],
-    'decoder_func': 'DoCompressedTexImage3D',
     'unsafe': True,
     'trace_level': 1,
   },
   'CompressedTexSubImage3D': {
-    'type': 'Data',
+    'type': 'Custom',
     'data_transfer_methods': ['bucket', 'shm'],
-    'decoder_func': 'DoCompressedTexSubImage3D',
     'unsafe': True,
     'trace_level': 1,
   },