Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/performance_monitor/performance_monitor.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 "chrome/browser/performance_monitor/performance_monitor.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 33 matching lines @@
 #include "net/url_request/url_request.h"
 
 using content::BrowserThread;
 using extensions::Extension;
 using extensions::UnloadedExtensionInfo;
 
 namespace performance_monitor {
 
 namespace {
 
+#if !defined(OS_ANDROID)
 std::string TimeToString(base::Time time) {
   int64 time_int64 = time.ToInternalValue();
   return base::Int64ToString(time_int64);
 }
+#endif
 
 bool StringToTime(std::string time, base::Time* output) {
   int64 time_int64 = 0;
   if (!base::StringToInt64(time, &time_int64))
     return false;
   *output = base::Time::FromInternalValue(time_int64);
   return true;
 }
 
 // Try to get the URL for the RenderViewHost if the host does not correspond to
@@ skipping 633 matching lines @@
     if (!url_list.empty())
       url_list += ", ";
 
     url_list += url;
   }
 
   AddEvent(util::CreateRendererFailureEvent(base::Time::Now(), type, url_list));
 }
 
 }  // namespace performance_monitor