Made sync code build and pass unit tests on OS X.

chrome/test/sync/engine/test_directory_setter_upper.cc

Index: chrome/test/sync/engine/test_directory_setter_upper.cc
diff --git a/chrome/test/sync/engine/test_directory_setter_upper.cc b/chrome/test/sync/engine/test_directory_setter_upper.cc
index 268579532f3fbd2493ddd1c73eec8bbfda0b5ba8..9e910f0aad7445b583767a5a14b7b333960cb90a 100644
--- a/chrome/test/sync/engine/test_directory_setter_upper.cc
+++ b/chrome/test/sync/engine/test_directory_setter_upper.cc
@@ -85,12 +85,6 @@ void ManuallyOpenedTestDirectorySetterUpper::TearDown() {
     TestDirectorySetterUpper::TearDown();
   }
 }
-    
-static PathString UTF8ToPathStringQuick(const std::string &str) {	
-  PathString ret;	
-  CHECK(browser_sync::UTF8ToPathString(str.data(), str.size(), &ret));	
-  return ret;	
-}
 
 TriggeredOpenTestDirectorySetterUpper::TriggeredOpenTestDirectorySetterUpper(
     const std::string& name)