Add crash keys to LocalDOMWindow to help diagnose bug 621730.

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

 /*
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 #include "core/frame/LocalDOMWindow.h"
 
+#include "base/debug/crash_logging.h"
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/SourceLocation.h"
 #include "core/css/CSSComputedStyleDeclaration.h"
 #include "core/css/CSSRuleList.h"
 #include "core/css/DOMWindowCSS.h"
 #include "core/css/MediaQueryList.h"
 #include "core/css/MediaQueryMatcher.h"
 #include "core/css/StyleMedia.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/DOMImplementation.h"
@@ skipping 641 matching lines @@
 void LocalDOMWindow::postMessageTimerFired(PostMessageTimer* timer)
 {
     if (!isCurrentlyDisplayedInFrame())
         return;
 
     MessageEvent* event = timer->event();
 
     UserGestureIndicator gestureIndicator(timer->userGestureToken());
 
     event->entangleMessagePorts(document());
+
+    // Temporary instrumentation for http://crbug.com/621730.
+    base::debug::ScopedCrashKey("postmessage_src_origin", event->origin().utf8().data());
+    base::debug::ScopedCrashKey("postmessage_dst_origin", document()->getSecurityOrigin()->toRawString().utf8().data());
+    base::debug::ScopedCrashKey("postmessage_dst_url", document()->url().getString().utf8().data());
     dispatchMessageEventWithOriginCheck(timer->targetOrigin(), event, timer->takeLocation());
 }
 
 void LocalDOMWindow::removePostMessageTimer(PostMessageTimer* timer)
 {
     m_postMessageTimers.remove(timer);
 }
 
 void LocalDOMWindow::dispatchMessageEventWithOriginCheck(SecurityOrigin* intendedTargetOrigin, Event* event, PassOwnPtr<SourceLocation> location)
 {
@@ skipping 850 matching lines @@
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     if (m_frameObserver->frame())
         ASSERT_WITH_SECURITY_IMPLICATION(m_frameObserver->frame()->domWindow() == this);
     return m_frameObserver->frame();
 }
 
 } // namespace blink