Fix a couple of firefox search engine import bugs.

chrome/browser/importer/firefox_importer_utils.h

Index: chrome/browser/importer/firefox_importer_utils.h
diff --git a/chrome/browser/importer/firefox_importer_utils.h b/chrome/browser/importer/firefox_importer_utils.h
index e2e23812ce927ca0ecfda33f0022bb408ae2f6a7..b5c4d6dfd436b89ea158ef98506ad096d7a91d0d 100644
--- a/chrome/browser/importer/firefox_importer_utils.h
+++ b/chrome/browser/importer/firefox_importer_utils.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_IMPORTER_FIREFOX_IMPORTER_UTILS_H_
 #pragma once
 
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -95,4 +96,9 @@ bool IsDefaultHomepage(const GURL& homepage, const FilePath& app_path);
 // key/pair is not valid UTF-8, it is ignored and will not appear in |prefs|.
 bool ParsePrefFile(const FilePath& pref_file, DictionaryValue* prefs);
 
+// Parses the value of a particular firefox preference from a string that is
+// the contents of the prefs file.
+std::string GetPrefsJsValue(const std::string& prefs,
+                            const std::string& pref_key);
+
 #endif  // CHROME_BROWSER_IMPORTER_FIREFOX_IMPORTER_UTILS_H_