Move SmartPointer to base.

src/string-stream.cc

Index: src/string-stream.cc
diff --git a/src/string-stream.cc b/src/string-stream.cc
index 5f61e0da1d2357004ae3deaca38a33b7110da390..92fff27683581784d8627f001daf8c937e1af31e 100644
--- a/src/string-stream.cc
+++ b/src/string-stream.cc
@@ -250,11 +250,11 @@ void StringStream::Add(const char* format, FmtElm arg0, FmtElm arg1,
 }
 
 
-SmartArrayPointer<const char> StringStream::ToCString() const {
+base::SmartArrayPointer<const char> StringStream::ToCString() const {
   char* str = NewArray<char>(length_ + 1);
   MemCopy(str, buffer_, length_);
   str[length_] = '\0';
-  return SmartArrayPointer<const char>(str);
+  return base::SmartArrayPointer<const char>(str);
 }