Fix resource scheduling on documents with <frameset>.

Source/core/html/HTMLFrameSetElement.cpp

Index: Source/core/html/HTMLFrameSetElement.cpp
diff --git a/Source/core/html/HTMLFrameSetElement.cpp b/Source/core/html/HTMLFrameSetElement.cpp
index 9ec4d6ec5c587fb882b375a66ea1f9fd12c185d3..6e74092bfc6d5678d46cd92c9c8945463e134006 100644
--- a/Source/core/html/HTMLFrameSetElement.cpp
+++ b/Source/core/html/HTMLFrameSetElement.cpp
@@ -34,6 +34,8 @@
 #include "core/dom/NodeRenderingContext.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLFrameElement.h"
+#include "core/loader/FrameLoaderClient.h"
+#include "core/page/Frame.h"
 #include "core/platform/Length.h"
 #include "core/rendering/RenderFrameSet.h"
 
@@ -197,6 +199,15 @@ void HTMLFrameSetElement::defaultEventHandler(Event* evt)
     HTMLElement::defaultEventHandler(evt);
 }
 
+Node::InsertionNotificationRequest HTMLFrameSetElement::insertedInto(ContainerNode* insertionPoint)
+{
+    if (document()->frame()) {
+        // A document using <frameset> likely won't literally have a body, but as far as the client is concerned, the frameset is effectively the body.
+        document()->frame()->loader()->client()->dispatchWillInsertBody();

[abarth-chromium, 2013/06/04 00:48:17]

Ok, in the second iteration of this CL, we might want to rename this function
now that it can be called multiple times (if the HTMLFrameSetElement is
repeatedly inserted and removed from the DOM).

We could also check insertionPoint->inDocument(), but that's not strictly
necessary.

+    }
+    return HTMLElement::insertedInto(insertionPoint);
+}
+
 void HTMLFrameSetElement::willRecalcStyle(StyleChange)
 {
     if (needsStyleRecalc() && renderer()) {