Avoid type truncation warnings when converting GLenum to GLboolean by inserting

gpu/command_buffer/client/gles2_implementation.cc

 // 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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
@@ skipping 2813 matching lines @@
   if (!result) {
     return false;
   }
   *result = 0;
   SetBucketAsCString(kResultBucketId, feature);
   helper_->EnableFeatureCHROMIUM(
       kResultBucketId, GetResultShmId(), GetResultShmOffset());
   WaitForCmd();
   helper_->SetBucketSize(kResultBucketId, 0);
   GPU_CLIENT_LOG("   returned " << GLES2Util::GetStringBool(*result));
-  return *result;
+  return *result != 0;
 }
 
 void* GLES2Implementation::MapBufferSubDataCHROMIUM(
     GLuint target, GLintptr offset, GLsizeiptr size, GLenum access) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glMapBufferSubDataCHROMIUM("
       << target << ", " << offset << ", " << size << ", "
       << GLES2Util::GetStringEnum(access) << ")");
   // NOTE: target is NOT checked because the service will check it
   // and we don't know what targets are valid.
@@ skipping 1336 matching lines @@
   return true;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu