Remove uses of deprecated toWebCoreStringWithUndefinedOrNullCheck(v8::Handle<v8::Value>)

Source/core/inspector/JavaScriptCallFrame.cpp

Index: Source/core/inspector/JavaScriptCallFrame.cpp
diff --git a/Source/core/inspector/JavaScriptCallFrame.cpp b/Source/core/inspector/JavaScriptCallFrame.cpp
index ae2d659d8a8dee3175699a56178a529839ae59be..4dcfd1e2afd09382bb09f3b1eb5ef44208ddcdb4 100644
--- a/Source/core/inspector/JavaScriptCallFrame.cpp
+++ b/Source/core/inspector/JavaScriptCallFrame.cpp
@@ -97,7 +97,8 @@ String JavaScriptCallFrame::functionName() const
     v8::HandleScope handleScope(m_isolate);
     v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
     v8::Handle<v8::Value> result = m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "functionName"));
-    return toWebCoreStringWithUndefinedOrNullCheck(result);
+    V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<WithUndefinedOrNullCheck>, name, result, String());
+    return name;
 }
 
 v8::Handle<v8::Value> JavaScriptCallFrame::scopeChain() const
@@ -125,7 +126,8 @@ String JavaScriptCallFrame::stepInPositions() const
     v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
     v8::Handle<v8::Function> stepInPositions = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "stepInPositions")));
     v8::Handle<v8::Value> result = stepInPositions->Call(callFrame, 0, 0);
-    return toWebCoreStringWithUndefinedOrNullCheck(result);
+    V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<WithUndefinedOrNullCheck>, resultString, result, String());
+    return resultString;
 }
 
 bool JavaScriptCallFrame::isAtReturn() const