[Search] Store and recall search terms using NavigationEntry to improve search term extraction

content/browser/web_contents/navigation_entry_impl.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 "content/browser/web_contents/navigation_entry_impl.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/url_constants.h"
@@ skipping 253 matching lines @@
 }
 
 void NavigationEntryImpl::SetCanLoadLocalResources(bool allow) {
   can_load_local_resources_ = allow;
 }
 
 bool NavigationEntryImpl::GetCanLoadLocalResources() const {
   return can_load_local_resources_;
 }
 
+void NavigationEntryImpl::SetExtraData(const std::string& key,
+                                       const string16& data) {
+  extra_data_[key] = data;
+}
+
+const bool NavigationEntryImpl::GetExtraData(const std::string& key,
+                                             string16* out_value) const {
+  ExtraDataMap::const_iterator iter = extra_data_.find(key);
+  if (iter == extra_data_.end())
+    return false;
+  *out_value = iter->second;
+  return true;
+}
+
 void NavigationEntryImpl::SetScreenshotPNGData(
     const std::vector<unsigned char>& png_data) {
   screenshot_ = png_data.empty() ? NULL : new base::RefCountedBytes(png_data);
 }
 
 }  // namespace content