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

chrome/browser/metrics/metrics_log.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/metrics/metrics_log.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 185 matching lines @@
     case PROCESS_TYPE_NACL_LOADER:
       return ProfilerEventProto::TrackedObject::NACL_LOADER;
     case PROCESS_TYPE_NACL_BROKER:
       return ProfilerEventProto::TrackedObject::NACL_BROKER;
     default:
       NOTREACHED();
       return ProfilerEventProto::TrackedObject::UNKNOWN;
   }
 }
 
+#if defined(ENABLE_PLUGINS)
 // Returns the plugin preferences corresponding for this user, if available.
 // If multiple user profiles are loaded, returns the preferences corresponding
 // to an arbitrary one of the profiles.
 PluginPrefs* GetPluginPrefs() {
   ProfileManager* profile_manager = g_browser_process->profile_manager();
 
   if (!profile_manager) {
     // The profile manager can be NULL when testing.
     return NULL;
   }
 
   std::vector<Profile*> profiles = profile_manager->GetLoadedProfiles();
   if (profiles.empty())
     return NULL;
 
   return PluginPrefs::GetForProfile(profiles.front()).get();
 }
 
 // Fills |plugin| with the info contained in |plugin_info| and |plugin_prefs|.
 void SetPluginInfo(const content::WebPluginInfo& plugin_info,
                    const PluginPrefs* plugin_prefs,
                    SystemProfileProto::Plugin* plugin) {
   plugin->set_name(UTF16ToUTF8(plugin_info.name));
   plugin->set_filename(plugin_info.path.BaseName().AsUTF8Unsafe());
   plugin->set_version(UTF16ToUTF8(plugin_info.version));
   plugin->set_is_pepper(plugin_info.is_pepper_plugin());
   if (plugin_prefs)
     plugin->set_is_disabled(!plugin_prefs->IsPluginEnabled(plugin_info));
 }
+#endif  // defined(ENABLE_PLUGINS)
 
 void WriteFieldTrials(const std::vector<ActiveGroupId>& field_trial_ids,
                       SystemProfileProto* system_profile) {
   for (std::vector<ActiveGroupId>::const_iterator it =
        field_trial_ids.begin(); it != field_trial_ids.end(); ++it) {
     SystemProfileProto::FieldTrial* field_trial =
         system_profile->add_field_trial();
     field_trial->set_name_id(it->name);
     field_trial->set_group_id(it->group);
   }
@@ skipping 716 matching lines @@
 
     // We invalidate the user count if it changed while the log was open.
     if (system_profile->has_multi_profile_user_count() &&
         user_count != system_profile->multi_profile_user_count())
       user_count = 0;
 
     system_profile->set_multi_profile_user_count(user_count);
   }
 }
 #endif