Fix Runtime.executionContextCreated for crafted iframes.

Source/core/inspector/InspectorPageAgent.cpp

Index: Source/core/inspector/InspectorPageAgent.cpp
diff --git a/Source/core/inspector/InspectorPageAgent.cpp b/Source/core/inspector/InspectorPageAgent.cpp
index d218e8ba0629fef86666b44d659f2a4cdd9785b2..c87869751d6a412342af6750cebeacb6a423675b 100644
--- a/Source/core/inspector/InspectorPageAgent.cpp
+++ b/Source/core/inspector/InspectorPageAgent.cpp
@@ -982,9 +982,6 @@ void InspectorPageAgent::setScriptExecutionDisabled(ErrorString*, bool value)
 
 void InspectorPageAgent::didClearDocumentOfWindowObject(LocalFrame* frame)
 {
-    if (frame == m_page->mainFrame())
-        m_injectedScriptManager->discardInjectedScripts();

[yurys, 2014/11/12 08:47:22]

Let's move it at some earlier point on the navigation to make sure that all
injected scripts are discarded and we don't leak them along with the window
context.

-
     if (!m_frontend)
         return;