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

chrome/browser/ui/webui/instant_ui.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/ui/webui/instant_ui.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
@@ skipping 15 matching lines @@
 content::WebUIDataSource* CreateInstantHTMLSource() {
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIInstantHost);
   source->SetJsonPath("strings.js");
   source->AddResourcePath("instant.js", IDR_INSTANT_JS);
   source->AddResourcePath("instant.css", IDR_INSTANT_CSS);
   source->SetDefaultResource(IDR_INSTANT_HTML);
   return source;
 }
 
+#if !defined(OS_ANDROID)
 std::string FormatTime(int64 time) {
   base::Time::Exploded exploded;
   base::Time::FromInternalValue(time).UTCExplode(&exploded);
   return base::StringPrintf("%04d-%02d-%02d %02d:%02d:%02d.%03d",
       exploded.year, exploded.month, exploded.day_of_month,
       exploded.hour, exploded.minute, exploded.second, exploded.millisecond);
 }
+#endif  // !defined(OS_ANDROID)
 
 // This class receives JavaScript messages from the renderer.
 // Note that the WebUI infrastructure runs on the UI thread, therefore all of
 // this class's methods are expected to run on the UI thread.
 class InstantUIMessageHandler
     : public content::WebUIMessageHandler,
       public base::SupportsWeakPtr<InstantUIMessageHandler> {
  public:
   InstantUIMessageHandler();
   virtual ~InstantUIMessageHandler();
@@ skipping 115 matching lines @@
 }
 
 // static
 void InstantUI::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterStringPref(
       prefs::kInstantUIZeroSuggestUrlPrefix,
       std::string(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }