Introduces a search term extraction mechanism working for arbitrary search providers.

chrome/browser/policy/configuration_policy_handler.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_POLICY_CONFIGURATION_POLICY_HANDLER_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 267 matching lines @@
 
   // Returns whether the default search provider is disabled.
   bool DefaultSearchProviderIsDisabled(const PolicyMap& policies);
 
   // Returns whether the default search URL is set and valid.  On success, both
   // outparams (which must be non-NULL) are filled with the search URL.
   bool DefaultSearchURLIsValid(const PolicyMap& policies,
                                const Value** url_value,
                                std::string* url_string);
 
-  // Make sure that the |path| if present in |prefs_|.  If not, set it to
+  // Make sure that the |path| is present in |prefs_|.  If not, set it to
   // a blank string.
   void EnsureStringPrefExists(PrefValueMap* prefs, const std::string& path);
 
+  // Make sure that the |path| is present in |prefs_| and is a ListValue.  If
+  // not, set it to an empty list.
+  void EnsureListPrefExists(PrefValueMap* prefs, const std::string& path);
+
   // The ConfigurationPolicyHandler handlers for each default search policy.
   std::vector<ConfigurationPolicyHandler*> handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(DefaultSearchPolicyHandler);
 };
 
 // ConfigurationPolicyHandler for the proxy policies.
 class ProxyPolicyHandler : public ConfigurationPolicyHandler {
  public:
   // Constants for the "Proxy Server Mode" defined in the policies.
@@ skipping 109 matching lines @@
   virtual void ApplyPolicySettings(const PolicyMap& policies,
                                    PrefValueMap* prefs) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DisabledPluginsByVersionPolicyHandler);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_HANDLER_H_