Android: Remove more browser extensions code, including some that snuck back in.

chrome/browser/performance_monitor/performance_monitor.h

 // 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.
 
 #ifndef CHROME_BROWSER_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_H_
 #define CHROME_BROWSER_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 155 matching lines @@
   // already present.
   void MarkProcessAsAlive(const base::ProcessHandle& handle,
                           int process_type,
                           int current_update_sequence);
 
   // Updates the ProcessMetrics map with the current list of processes and
   // gathers metrics from each entry.
   void GatherMetricsMapOnUIThread();
   void GatherMetricsMapOnIOThread(int current_update_sequence);
 
+#if defined(ENABLE_EXTENSIONS)
   // Generate an appropriate ExtensionEvent for an extension-related occurrance
   // and insert it in the database.
   void AddExtensionEvent(EventType type,
                          const extensions::Extension* extension);
+#endif
 
   // Generate an appropriate RendererFailure for a renderer crash and insert it
   // in the database.
   void AddRendererClosedEvent(
       content::RenderProcessHost* host,
       const content::RenderProcessHost::RendererClosedDetails& details);
 
   // The store for all performance data that must be gathered from the IO
   // thread.
   PerformanceDataForIOThread performance_data_for_io_thread_;
@@ skipping 30 matching lines @@
 
   // Disable auto-starting the collection timer; used for tests.
   bool disable_timer_autostart_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(PerformanceMonitor);
 };
 
 }  // namespace performance_monitor
 
 #endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_PERFORMANCE_MONITOR_H_