Merge DevTools Refactor CL to Blink36

Source/bindings/dart/DartUtilities.cpp

Index: Source/bindings/dart/DartUtilities.cpp
diff --git a/Source/bindings/dart/DartUtilities.cpp b/Source/bindings/dart/DartUtilities.cpp
index 8a3d43ba6daea83bd820a7ddc635a43fe8d1ff37..5a6f0309c2f90df4f5b2f4309810f52d6b30c7ac 100644
--- a/Source/bindings/dart/DartUtilities.cpp
+++ b/Source/bindings/dart/DartUtilities.cpp
@@ -942,6 +942,11 @@ DOMWindow* DartUtilities::domWindowForCurrentIsolate()
     return document->domWindow();
 }
 
+ScriptState* DartUtilities::v8ScriptStateForCurrentIsolate()
+{
+    return ScriptState::forMainWorld(domWindowForCurrentIsolate()->frame());
+}
+
 ExecutionContext* DartUtilities::scriptExecutionContext()
 {
     if (Dart_CurrentIsolate())
@@ -1033,6 +1038,47 @@ static PassRefPtr<ScriptCallStack> createScriptCallStackFromStackTrace(Dart_Stac
     return ScriptCallStack::create(scriptCallStackFrames);
 }
 
+ScriptCallFrame DartUtilities::getTopFrame(Dart_StackTrace stackTrace, Dart_Handle& exception)
+{
+    {
+        uintptr_t frameCount = 0;
+        Dart_Handle result = Dart_StackTraceLength(stackTrace, reinterpret_cast<intptr_t*>(&frameCount));
+        if (Dart_IsError(result)) {
+            exception = result;
+            goto fail;
+        }
+        if (!frameCount) {
+            exception = Dart_NewStringFromCString("Empty stack trace");
+            goto fail;
+        }
+        Dart_ActivationFrame frame = 0;
+        result = Dart_GetActivationFrame(stackTrace, 0, &frame);
+        if (Dart_IsError(result)) {
+            exception = result;
+            goto fail;
+        }
+        ASSERT(frame);
+        return toScriptCallFrame(frame, exception);
+    }
+fail:
+    return ScriptCallFrame("undefined", "undefined", "undefined", 0, 0);
+}
+
+ScriptCallFrame DartUtilities::toScriptCallFrame(Dart_ActivationFrame frame, Dart_Handle& exception)
+{
+    ASSERT(frame);
+    Dart_Handle functionName;
+    Dart_Handle scriptUrl;
+    intptr_t lineNumber = 0;
+    intptr_t columnNumber = 0;
+    Dart_Handle result = Dart_ActivationFrameInfo(frame, &functionName, &scriptUrl, &lineNumber, &columnNumber);
+    if (Dart_IsError(result)) {
+        exception = result;
+        return ScriptCallFrame("undefined", "undefined", "undefined", 0, 0);
+    }
+    return ScriptCallFrame(DartUtilities::toString(functionName), "undefined", DartUtilities::toString(scriptUrl), lineNumber, columnNumber);
+}
+
 PassRefPtr<ScriptCallStack> DartUtilities::createScriptCallStack()
 {
     Dart_StackTrace trace = 0;