Remove usage of FOR_EACH_OBSERVER macro in gpu

gpu/command_buffer/service/shader_translator.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.
 
 #include "gpu/command_buffer/service/shader_translator.h"
 
 #include <GLES2/gl2.h>
 #include <stddef.h>
 #include <string.h>
 #include <algorithm>
@@ skipping 258 matching lines @@
     DestructionObserver* observer) {
   destruction_observers_.AddObserver(observer);
 }
 
 void ShaderTranslator::RemoveDestructionObserver(
     DestructionObserver* observer) {
   destruction_observers_.RemoveObserver(observer);
 }
 
 ShaderTranslator::~ShaderTranslator() {
-  FOR_EACH_OBSERVER(DestructionObserver,
-                    destruction_observers_,
-                    OnDestruct(this));
+  for (auto& observer : destruction_observers_)
+    observer.OnDestruct(this);
 
   if (compiler_ != NULL)
     ShDestruct(compiler_);
 }
 
 }  // namespace gles2
 }  // namespace gpu