Added issue on crashing Dartium 45 pausing and remove method not used.

Source/bindings/core/dart/DartUtilities.cpp

 // Copyright 2011, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
@@ skipping 421 matching lines @@
     if (minJSInteger <= value && value <= maxJSInteger) {
         int64_t intValue = static_cast<int64_t>(value);
         if (value == intValue)
             return intToDart(intValue);
     }
     return doubleToDart(value);
 }
 
 ScriptValue DartUtilities::dartToScriptValue(Dart_Handle object)
 {
+    // TODO(terry): Added bug per JacobR - he thinks it would be better to use
+    //              DartHandleProxy probably pressing pause crashes Dartium 45.
+    //              See issue: https://github.com/dart-lang/sdk/issues/25589
     Dart_Handle exception = 0;
     ScriptState* v8ScriptState = currentDartScriptState()->v8ScriptState();
     v8::Handle<v8::Value> value = V8Converter::toV8(object, exception);
     if (exception)
         return ScriptValue(v8ScriptState, v8::Undefined(v8ScriptState->isolate()));
     ASSERT(!value.IsEmpty());
 
     return ScriptValue(v8ScriptState, value);
 }
 
@@ skipping 644 matching lines @@
     if (!dartDOMData->rootScriptState()) {
         DartController* controller = DartController::retrieve(dartDOMData->scriptExecutionContext());
         intptr_t libraryId = DartUtilities::libraryHandleToLibraryId(Dart_RootLibrary());
         DartScriptState* scriptState = controller->lookupScriptState(Dart_CurrentIsolate(), currentV8Context(), libraryId);
         dartDOMData->setRootScriptState(scriptState);
         return scriptState;
     }
     return dartDOMData->rootScriptState();
 }
 
-PassRefPtr<ScriptArguments> DartUtilities::createScriptArguments(Dart_Handle argument, Dart_Handle& exception)
-{
-    Vector<ScriptValue> arguments;
-    arguments.append(DartUtilities::dartToScriptValue(argument));
-    return ScriptArguments::create(DartUtilities::currentDartScriptState()->v8ScriptState(), arguments);
-}
-
 static PassRefPtr<ScriptCallStack> createScriptCallStackFromStackTrace(Dart_StackTrace stackTrace)
 {
     uintptr_t frameCount = 0;
     Dart_Handle result = Dart_StackTraceLength(stackTrace, reinterpret_cast<intptr_t*>(&frameCount));
     if (Dart_IsError(result))
         return nullptr;
 
     if (frameCount > ScriptCallStack::maxCallStackSizeToCapture)
         frameCount = ScriptCallStack::maxCallStackSizeToCapture;
 
@@ skipping 274 matching lines @@
     if (!v) {
         return 0;
     }
     ASSERT(valueLen > 0 && static_cast<size_t>(valueLen) > strlen(v));
     strncpy(value, v, valueLen);
     value[valueLen - 1] = '\0';
     return strlen(value);
 #endif
 }
 }