Refactor BreakLocationIterator.

test/cctest/test-func-name-inference.cc

Index: test/cctest/test-func-name-inference.cc
diff --git a/test/cctest/test-func-name-inference.cc b/test/cctest/test-func-name-inference.cc
index 24f9c73532fee85aca402c808732841f0528b78b..ae8e77d745b14f07b30028fb49d352f336c4aa4e 100644
--- a/test/cctest/test-func-name-inference.cc
+++ b/test/cctest/test-func-name-inference.cc
@@ -81,11 +81,9 @@ static void CheckFunctionName(v8::Handle<v8::Script> script,
 
   // Obtain SharedFunctionInfo for the function.
   isolate->debug()->PrepareForBreakPoints();
-  Object* shared_func_info_ptr =
-      isolate->debug()->FindSharedFunctionInfoInScript(i_script, func_pos);
-  CHECK(shared_func_info_ptr != CcTest::heap()->undefined_value());
-  Handle<SharedFunctionInfo> shared_func_info(
-      SharedFunctionInfo::cast(shared_func_info_ptr));
+  Handle<SharedFunctionInfo> shared_func_info =
+      Handle<SharedFunctionInfo>::cast(
+          isolate->debug()->FindSharedFunctionInfoInScript(i_script, func_pos));
 
   // Verify inferred function name.
   SmartArrayPointer<char> inferred_name =