Fix extensions compile issues for Android on sync_unit_tests.

chrome/browser/extensions/process_map.cc

 // Copyright (c) 2011 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/extensions/process_map.h"
 
 namespace extensions {
 
 // Item
 struct ProcessMap::Item {
@@ skipping 54 matching lines @@
   return items_.insert(Item(extension_id, process_id, site_instance_id)).second;
 }
 
 bool ProcessMap::Remove(const std::string& extension_id, int process_id,
                         int site_instance_id) {
   return items_.erase(Item(extension_id, process_id, site_instance_id)) > 0;
 }
 
 int ProcessMap::RemoveAllFromProcess(int process_id) {
   int result = 0;
-  for (ItemSet::const_iterator iter = items_.begin(); iter != items_.end(); ) {
+  for (ItemSet::iterator iter = items_.begin(); iter != items_.end(); ) {
     if (iter->process_id == process_id) {
       items_.erase(iter++);
       ++result;
     } else {
       ++iter;
     }
   }
   return result;
 }
 
@@ skipping 20 matching lines @@
   std::set<std::string> result;
   for (ItemSet::const_iterator iter = items_.begin(); iter != items_.end();
        ++iter) {
     if (iter->process_id == process_id)
       result.insert(iter->extension_id);
   }
   return result;
 }
 
 }  // extensions