Don't include the tracing in gpu_memory_buffer.h

gpu/command_buffer/tests/es3_misc_functions_unittest.cc

 // Copyright 2015 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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 #include <GLES3/gl3.h>
 
 #include "base/command_line.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_switches.h"
 
 #define SHADER_VERSION_300(Src) "#version 300 es\n" #Src
 
 namespace gpu {
 
@@ skipping 82 matching lines @@
                                                extensions.end());
   std::set<std::string> extensions_from_stringi;
   for (int i = 0; i < num_extensions; ++i) {
     extensions_from_stringi.insert(
         reinterpret_cast<const char*>(glGetStringi(GL_EXTENSIONS, i)));
   }
   EXPECT_EQ(extensions_from_string, extensions_from_stringi);
 }
 
 }  // namespace gpu