Add FilePath to base namespace.

chrome/browser/history/top_sites_database.h

Index: chrome/browser/history/top_sites_database.h
diff --git a/chrome/browser/history/top_sites_database.h b/chrome/browser/history/top_sites_database.h
index 313c7063f9772b334034f10846d728c6a69bcf04..42e04ed18cdfb9dd6ca07e9c96020fb949ae28bd 100644
--- a/chrome/browser/history/top_sites_database.h
+++ b/chrome/browser/history/top_sites_database.h
@@ -13,7 +13,9 @@
 #include "chrome/browser/history/url_database.h"  // For DBCloseScoper.
 #include "sql/meta_table.h"
 
+namespace base {
 class FilePath;
+}
 
 namespace sql {
 class Connection;
@@ -28,7 +30,7 @@ class TopSitesDatabase {
 
   // Must be called after creation but before any other methods are called.
   // Returns true on success. If false, no other functions should be called.
-  bool Init(const FilePath& db_name);
+  bool Init(const base::FilePath& db_name);
 
   // Returns true if migration of top sites from history may be needed. A value
   // of true means either migration is definitely needed (the top sites file is
@@ -92,7 +94,7 @@ class TopSitesDatabase {
   // Returns the number of URLs (rows) in the database.
   int GetRowCount();
 
-  sql::Connection* CreateDB(const FilePath& db_name);
+  sql::Connection* CreateDB(const base::FilePath& db_name);
 
   // Encodes redirects into a string.
   static std::string GetRedirects(const MostVisitedURL& url);