Harden CommandBufferProxyImpl

gpu/command_buffer/common/constants.h

 // Copyright (c) 2012 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.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
 #define GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 34 matching lines @@
 
     // GL_OUT_OF_MEMORY caused this context to be lost.
     kOutOfMemory,
 
     // A failure to make the context current caused it to be lost.
     kMakeCurrentFailed,
 
     // The GPU channel was lost. This error is set client-side.
     kGpuChannelLost,
 
+    // The GPU process sent an invalid message/reply. This error is set
+    // client-side.
+    kInvalidGpuMessage,
+
     kContextLostReasonLast = kGpuChannelLost
   };
 }
 
 // Invalid shared memory Id, returned by RegisterSharedMemory in case of
 // failure.
 const int32_t kInvalidSharedMemoryId = -1;
 
 // Common Command Buffer shared memory transfer buffer ID.
 const int32_t kCommandBufferSharedMemoryId = 4;
@@ skipping 10 matching lines @@
   MOJO,
   MOJO_LOCAL,
   OLD_SYNC_POINTS,
 
   NUM_COMMAND_BUFFER_NAMESPACES
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_