Add FilePath to base namespace.

chrome/browser/value_store/value_store_frontend.h

Index: chrome/browser/value_store/value_store_frontend.h
diff --git a/chrome/browser/value_store/value_store_frontend.h b/chrome/browser/value_store/value_store_frontend.h
index 19c0f23e93ae478f3f4659929cef0c4af06131a2..0a4c0ba447ffa3c9cc05facb43492ae802d32a9f 100644
--- a/chrome/browser/value_store/value_store_frontend.h
+++ b/chrome/browser/value_store/value_store_frontend.h
@@ -14,9 +14,12 @@
 #include "base/threading/non_thread_safe.h"
 #include "base/values.h"
 
-class FilePath;
 class ValueStore;
 
+namespace base {
+class FilePath;
+}
+
 // A frontend for a LeveldbValueStore, for use on the UI thread.
 class ValueStoreFrontend
     : public base::SupportsWeakPtr<ValueStoreFrontend>,
@@ -25,12 +28,12 @@ class ValueStoreFrontend
   typedef base::Callback<void(scoped_ptr<base::Value>)> ReadCallback;
 
   ValueStoreFrontend();
-  explicit ValueStoreFrontend(const FilePath& db_path);
+  explicit ValueStoreFrontend(const base::FilePath& db_path);
   // This variant is useful for testing (using a mock ValueStore).
   explicit ValueStoreFrontend(ValueStore* value_store);
   ~ValueStoreFrontend();
 
-  void Init(const FilePath& db_path);
+  void Init(const base::FilePath& db_path);
 
   // Retrieves a value from the database asynchronously, passing a copy to
   // |callback| when ready. NULL is passed if no matching entry is found.