Fix bug where Dart execution contexts were getting the wrong execution context id.

Source/core/inspector/PageRuntimeAgent.cpp

Index: Source/core/inspector/PageRuntimeAgent.cpp
diff --git a/Source/core/inspector/PageRuntimeAgent.cpp b/Source/core/inspector/PageRuntimeAgent.cpp
index 442b959b5be8b2d671ae922f468c645b3fba774e..12958c11b56cf613856366529f0f43909fd76d16 100644
--- a/Source/core/inspector/PageRuntimeAgent.cpp
+++ b/Source/core/inspector/PageRuntimeAgent.cpp
@@ -32,6 +32,7 @@
 #include "core/inspector/PageRuntimeAgent.h"
 
 #include "bindings/core/dart/DartController.h"
+#include "bindings/core/dart/DartInspectorRuntimeAgent.h"
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ScriptState.h"
@@ -190,7 +191,6 @@ void PageRuntimeAgent::reportExecutionContextCreation()
 void PageRuntimeAgent::notifyDartContextCreated(const String& frameId, ScriptState* v8ScriptState)
 {
     ExecutionContext* executionContext = v8ScriptState->executionContext();
-    int executionContextId = injectedScriptManager()->injectedScriptIdFor(v8ScriptState);
     DartController* dartController = DartController::retrieve(executionContext);
     if (dartController) {
         Vector<DartScriptState*> scriptStates;
@@ -198,7 +198,7 @@ void PageRuntimeAgent::notifyDartContextCreated(const String& frameId, ScriptSta
         // TODO(jacobr): now that there is a human readable name field we could possibly leave orign blank.
         for (size_t i = 0; i< scriptStates.size(); i++) {
             DartScriptState* state = scriptStates[i];
-            addExecutionContextToFrontendDart(executionContextId, "", *(state->name()), *(state->name()), frameId, "Dart", state->libraryId());
+            m_dart->addExecutionContextToFrontendHelper(state, true, *(state->name()), frameId);
         }
     }
 }