command_buffer: Implement CHROMIUM_framebuffer_mixed_samples extension

gpu/command_buffer/common/gles2_cmd_ids_autogen.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 313 matching lines @@
   OP(StencilThenCoverFillPathCHROMIUM)            /* 565 */ \
   OP(StencilThenCoverStrokePathCHROMIUM)          /* 566 */ \
   OP(StencilFillPathInstancedCHROMIUM)            /* 567 */ \
   OP(StencilStrokePathInstancedCHROMIUM)          /* 568 */ \
   OP(CoverFillPathInstancedCHROMIUM)              /* 569 */ \
   OP(CoverStrokePathInstancedCHROMIUM)            /* 570 */ \
   OP(StencilThenCoverFillPathInstancedCHROMIUM)   /* 571 */ \
   OP(StencilThenCoverStrokePathInstancedCHROMIUM) /* 572 */ \
   OP(BindFragmentInputLocationCHROMIUMBucket)     /* 573 */ \
   OP(ProgramPathFragmentInputGenCHROMIUM)         /* 574 */ \
-  OP(BlendBarrierKHR)                             /* 575 */ \
-  OP(ApplyScreenSpaceAntialiasingCHROMIUM)        /* 576 */ \
-  OP(BindFragDataLocationIndexedEXTBucket)        /* 577 */ \
-  OP(BindFragDataLocationEXTBucket)               /* 578 */ \
-  OP(GetFragDataIndexEXT)                         /* 579 */
+  OP(CoverageModulationCHROMIUM)                  /* 575 */ \
+  OP(BlendBarrierKHR)                             /* 576 */ \
+  OP(ApplyScreenSpaceAntialiasingCHROMIUM)        /* 577 */ \
+  OP(BindFragDataLocationIndexedEXTBucket)        /* 578 */ \
+  OP(BindFragDataLocationEXTBucket)               /* 579 */ \
+  OP(GetFragDataIndexEXT)                         /* 580 */
 
 enum CommandId {
   kStartPoint = cmd::kLastCommonId,  // All GLES2 commands start after this.
 #define GLES2_CMD_OP(name) k##name,
   GLES2_COMMAND_LIST(GLES2_CMD_OP)
 #undef GLES2_CMD_OP
       kNumCommands
 };
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_IDS_AUTOGEN_H_