Added memory limit for chrome.activityLogPrivate returned results

chrome/browser/extensions/activity_log/fullstream_ui_policy.cc

 // Copyright 2013 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/activity_log/fullstream_ui_policy.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
@@ skipping 140 matching lines @@
   }
   if (!page_url.empty()) {
     where_str += where_next + "page_url LIKE ?";
     where_next = " AND ";
   }
   if (!arg_url.empty()) {
     where_str += where_next + "arg_url LIKE ?";
   }
   std::string query_str = base::StringPrintf(
       "SELECT extension_id,time,action_type,api_name,args,page_url,page_title,"
-      "arg_url,other FROM %s WHERE %s ORDER BY time DESC",
+      "arg_url,other FROM %s WHERE %s ORDER BY time DESC LIMIT 300",
       kTableName,
       where_str.c_str());
   sql::Statement query(db->GetUniqueStatement(query_str.c_str()));
   int i = -1;
   if (!extension_id.empty())
     query.BindString(++i, extension_id);
   if (!api_name.empty())
     query.BindString(++i, api_name);
   if (type != Action::ACTION_ANY)
     query.BindInt(++i, static_cast<int>(type));
@@ skipping 237 matching lines @@
 }
 
 void FullStreamUIPolicy::QueueAction(scoped_refptr<Action> action) {
   if (activity_database()->is_db_valid()) {
     queued_actions_.push_back(action);
     activity_database()->AdviseFlush(queued_actions_.size());
   }
 }
 
 }  // namespace extensions