Printing: Convert several wstrings to string16.

printing/page_overlays_unittest.cc

Index: printing/page_overlays_unittest.cc
diff --git a/printing/page_overlays_unittest.cc b/printing/page_overlays_unittest.cc
index a7ea2833acdb6c94999a4ace399f324e27aa3279..3ff8be126193f895a5c11db6d5b61e94c9001bdc 100644
--- a/printing/page_overlays_unittest.cc
+++ b/printing/page_overlays_unittest.cc
@@ -3,7 +3,9 @@
 // found in the LICENSE file.
 
 #include "base/message_loop.h"
+#include "base/string16.h"
 #include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "printing/page_overlays.h"
 #include "printing/print_settings.h"
 #include "printing/printed_document.h"
@@ -30,8 +32,8 @@ const Keys kOverlayKeys[] = {
 
 class PagesSource : public printing::PrintedPagesSource {
  public:
-  virtual std::wstring RenderSourceName() {
-    return L"Foobar Document";
+  virtual string16 RenderSourceName() {
+    return ASCIIToUTF16("Foobar Document");
   }
 
   virtual GURL RenderSourceUrl() {