Add base:: to string16s in sandbox/.

sandbox/win/src/handle_table.h

Index: sandbox/win/src/handle_table.h
diff --git a/sandbox/win/src/handle_table.h b/sandbox/win/src/handle_table.h
index 21ff80ff4817d3390055ec267d4eb7e23865e6be..e36bdb47f8980a8e3a21f56bdd1d39b2ae710255 100644
--- a/sandbox/win/src/handle_table.h
+++ b/sandbox/win/src/handle_table.h
@@ -54,11 +54,11 @@ class HandleTable {
 
     const OBJECT_TYPE_INFORMATION* TypeInfo();
 
-    const string16& Name();
+    const base::string16& Name();
 
-    const string16& Type();
+    const base::string16& Type();
 
-    bool IsType(const string16& type_string);
+    bool IsType(const base::string16& type_string);
 
    private:
     friend class Iterator;
@@ -84,8 +84,8 @@ class HandleTable {
     const SYSTEM_HANDLE_INFORMATION* handle_entry_;
     const SYSTEM_HANDLE_INFORMATION* last_entry_;
     std::vector<BYTE> type_info_buffer_;
-    string16 handle_name_;
-    string16 type_name_;
+    base::string16 handle_name_;
+    base::string16 type_name_;
 
     DISALLOW_COPY_AND_ASSIGN(HandleEntry);
   };