Fix base::GetNativeLibraryName() for Mac.

base/native_library_win.cc

Index: base/native_library_win.cc
diff --git a/base/native_library_win.cc b/base/native_library_win.cc
index faf0bdba4be5fa3bbc74d4b960f6ea0adee4e7a9..31753568000eb36ad4f77b116e423ff3d6157df9 100644
--- a/base/native_library_win.cc
+++ b/base/native_library_win.cc
@@ -7,6 +7,7 @@
 #include <windows.h>
 
 #include "base/files/file_util.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
@@ -80,8 +81,9 @@ void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
 }
 
 // static
-string16 GetNativeLibraryName(StringPiece16 name) {
-  return name.as_string() + ASCIIToUTF16(".dll");
+std::string GetNativeLibraryName(StringPiece name) {
+  DCHECK(IsStringASCII(name));
+  return name.as_string() + ".dll";
 }
 
 }  // namespace base