webkit: Append base:: in the StringPrintf calls.

webkit/glue/user_agent.cc

Index: webkit/glue/user_agent.cc
diff --git a/webkit/glue/user_agent.cc b/webkit/glue/user_agent.cc
index df4c3f54b704e2a19ed76361635e1e1ab74d3063..2babb49f56c9769342b7a7bf99aadc8a469e4a15 100644
--- a/webkit/glue/user_agent.cc
+++ b/webkit/glue/user_agent.cc
@@ -9,6 +9,7 @@
 #endif
 
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/sys_info.h"
 
 // Generated
@@ -21,7 +22,8 @@ namespace webkit_glue {
 std::string GetProductVersion();
 
 std::string GetWebKitVersion() {
-  return StringPrintf("%d.%d", WEBKIT_VERSION_MAJOR, WEBKIT_VERSION_MINOR);
+  return base::StringPrintf("%d.%d", WEBKIT_VERSION_MAJOR,
+                                     WEBKIT_VERSION_MINOR);
 }
 
 std::string BuildOSCpuInfo() {