Convert string16 to base::string16 in content.

content/browser/indexed_db/indexed_db_database_error.h

Index: content/browser/indexed_db/indexed_db_database_error.h
diff --git a/content/browser/indexed_db/indexed_db_database_error.h b/content/browser/indexed_db/indexed_db_database_error.h
index 297bec7be331991ad67a134316588f314197c5cb..1a4f449d81811a7d153a6046ae8ae29a2463aa4a 100644
--- a/content/browser/indexed_db/indexed_db_database_error.h
+++ b/content/browser/indexed_db/indexed_db_database_error.h
@@ -17,16 +17,16 @@ class IndexedDBDatabaseError {
       : code_(code) {}
   IndexedDBDatabaseError(uint16 code, const char* message)
       : code_(code), message_(ASCIIToUTF16(message)) {}
-  IndexedDBDatabaseError(uint16 code, const string16& message)
+  IndexedDBDatabaseError(uint16 code, const base::string16& message)
       : code_(code), message_(message) {}
   ~IndexedDBDatabaseError() {}
 
   uint16 code() const { return code_; }
-  const string16& message() const { return message_; }
+  const base::string16& message() const { return message_; }
 
  private:
   const uint16 code_;
-  const string16 message_;
+  const base::string16 message_;
 };
 
 }  // namespace content