Fixed some bugs that prevented the GPU plugin from shutting down without cras...

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2009 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <vector>
 #include <string>
@@ skipping 1130 matching lines @@
   } else {
     current_program_info_ = info;
     glUseProgram(program);
   }
 }
 
 GLenum GLES2DecoderImpl::GetGLError() {
   // Check the GL error first, then our wrapped error.
   GLenum error = glGetError();
   if (error == GL_NO_ERROR && error_bits_ != 0) {
-    uint32 mask = 1;
-    while (mask) {
+    for (uint32 mask = 1; mask != 0; mask = mask << 1) {
       if ((error_bits_ & mask) != 0) {
         error = GLErrorBitToGLError(mask);
         break;
       }
     }
   }
 
   if (error != GL_NO_ERROR) {
     // There was an error, clear the corresponding wrapped error.
     error_bits_ &= ~GLErrorToErrorBit(error);
@@ skipping 592 matching lines @@
   return parse_error::kParseNoError;
 }
 
 // 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/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu