Add FilePath to base namespace.

ui/gfx/icon_util.h

Index: ui/gfx/icon_util.h
diff --git a/ui/gfx/icon_util.h b/ui/gfx/icon_util.h
index 4aa2676c71da4e8ef1b26a39e43f555dbe0bbb52..b48c0a52af7c150188f808818f4422ee3bd46e7a 100644
--- a/ui/gfx/icon_util.h
+++ b/ui/gfx/icon_util.h
@@ -16,10 +16,13 @@
 #include "ui/gfx/point.h"
 #include "ui/gfx/size.h"
 
+namespace base {
+class FilePath;
+}
+
 namespace gfx {
 class Size;
 }
-class FilePath;
 class SkBitmap;
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -107,7 +110,7 @@ class UI_EXPORT IconUtil {
   // The function returns true on success and false otherwise.
   static bool CreateIconFileFromSkBitmap(const SkBitmap& bitmap,
                                          const SkBitmap& large_bitmap,
-                                         const FilePath& icon_path);
+                                         const base::FilePath& icon_path);
 
   // Creates a cursor of the specified size from the DIB passed in.
   // Returns the cursor on success or NULL on failure.