implement getBufferSubDataAsync prototype

gpu/command_buffer/common/gles2_cmd_ids_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_ids_autogen.h
diff --git a/gpu/command_buffer/common/gles2_cmd_ids_autogen.h b/gpu/command_buffer/common/gles2_cmd_ids_autogen.h
index c21bbcffee1d2bcdb99c1a54a846788010b13402..1f277689f27dc09fbd623c8e6f319299577fefae 100644
--- a/gpu/command_buffer/common/gles2_cmd_ids_autogen.h
+++ b/gpu/command_buffer/common/gles2_cmd_ids_autogen.h
@@ -319,14 +319,15 @@
   OP(StencilThenCoverStrokePathInstancedCHROMIUM)          /* 560 */ \
   OP(BindFragmentInputLocationCHROMIUMBucket)              /* 561 */ \
   OP(ProgramPathFragmentInputGenCHROMIUM)                  /* 562 */ \
-  OP(CoverageModulationCHROMIUM)                           /* 563 */ \
-  OP(BlendBarrierKHR)                                      /* 564 */ \
-  OP(ApplyScreenSpaceAntialiasingCHROMIUM)                 /* 565 */ \
-  OP(BindFragDataLocationIndexedEXTBucket)                 /* 566 */ \
-  OP(BindFragDataLocationEXTBucket)                        /* 567 */ \
-  OP(GetFragDataIndexEXT)                                  /* 568 */ \
-  OP(UniformMatrix4fvStreamTextureMatrixCHROMIUMImmediate) /* 569 */ \
-  OP(SwapBuffersWithDamageCHROMIUM)                        /* 570 */
+  OP(GetBufferSubDataAsyncCHROMIUM)                        /* 563 */ \
+  OP(CoverageModulationCHROMIUM)                           /* 564 */ \
+  OP(BlendBarrierKHR)                                      /* 565 */ \
+  OP(ApplyScreenSpaceAntialiasingCHROMIUM)                 /* 566 */ \
+  OP(BindFragDataLocationIndexedEXTBucket)                 /* 567 */ \
+  OP(BindFragDataLocationEXTBucket)                        /* 568 */ \
+  OP(GetFragDataIndexEXT)                                  /* 569 */ \
+  OP(UniformMatrix4fvStreamTextureMatrixCHROMIUMImmediate) /* 570 */ \
+  OP(SwapBuffersWithDamageCHROMIUM)                        /* 571 */
 
 enum CommandId {
   kOneBeforeStartPoint =