[UMA] Add performance profile data to UMA uploads.

base/profiler/alternate_timer.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 "base/profiler/alternate_timer.h"
 
 #include "base/logging.h"
 
+namespace {
+
+tracked_objects::NowFunction* g_time_function = NULL;
+
+}  // anonymous namespace
+
 namespace tracked_objects {
 
-static NowFunction* g_time_function = NULL;
-
 const char kAlternateProfilerTime[] = "CHROME_PROFILER_TIME";
 
 // Set an alternate timer function to replace the OS time function when
 // profiling.
 void SetAlternateTimeSource(NowFunction* now_function) {
-  DCHECK_EQ(g_time_function, reinterpret_cast<NowFunction*>(NULL));
+  DCHECK_EQ(reinterpret_cast<NowFunction*>(NULL), g_time_function);
   g_time_function = now_function;
 }
 
-extern NowFunction* GetAlternateTimeSource() {
+NowFunction* GetAlternateTimeSource() {
   return g_time_function;
 }
-}  // tracked_objects
+
+}  // namespace tracked_objects