Move StringPiece into the base namespace. It is colliding

webkit/glue/webkit_glue.h

Index: webkit/glue/webkit_glue.h
diff --git a/webkit/glue/webkit_glue.h b/webkit/glue/webkit_glue.h
index 302f0471e05b312316fbb12a0a3e377444608bcc..eab53a4ac8dc6a7ad0c4f7ab84b14cf6e56ad7ed 100644
--- a/webkit/glue/webkit_glue.h
+++ b/webkit/glue/webkit_glue.h
@@ -21,10 +21,13 @@
 
 class GURL;
 class SkBitmap;
-class StringPiece;
 class WebView;
 struct WebPluginInfo;
 
+namespace base {
+class StringPiece;
+}
+
 namespace skia {
 class PlatformCanvas;
 }
@@ -139,7 +142,7 @@ string16 GetLocalizedString(int message_id);
 
 // Returns the raw data for a resource.  This resource must have been
 // specified as BINDATA in the relevant .rc file.
-StringPiece GetDataResource(int resource_id);
+base::StringPiece GetDataResource(int resource_id);
 
 #if defined(OS_WIN)
 // Loads and returns a cursor.