DevTools: use per-LocalFrame instrumenting agents instead of per-Page ones.

Source/core/inspector/InspectorDOMAgent.cpp

Index: Source/core/inspector/InspectorDOMAgent.cpp
diff --git a/Source/core/inspector/InspectorDOMAgent.cpp b/Source/core/inspector/InspectorDOMAgent.cpp
index 95745c5ab4e572aa4876721bf792a9246fbf8022..fc07b0e7b44bd8cda93b0fb3b23706dae2554674 100644
--- a/Source/core/inspector/InspectorDOMAgent.cpp
+++ b/Source/core/inspector/InspectorDOMAgent.cpp
@@ -1900,7 +1900,7 @@ bool InspectorDOMAgent::isWhitespace(Node* node)
 
 void InspectorDOMAgent::domContentLoadedEventFired(LocalFrame* frame)
 {
-    if (!frame->isMainFrame())
+    if (frame != m_pageAgent->mainFrame())
         return;
 
     // Re-push document once it is loaded.
@@ -1930,14 +1930,9 @@ void InspectorDOMAgent::invalidateFrameOwnerElement(LocalFrame* frame)
     m_frontend->childNodeInserted(parentId, prevId, value.release());
 }
 
-void InspectorDOMAgent::didCommitLoad(LocalFrame* frame, DocumentLoader* loader)
+void InspectorDOMAgent::didCommitLoad(LocalFrame*, DocumentLoader* loader)
 {
-    // FIXME: If "frame" is always guarenteed to be in the same Page as loader->frame()
-    // then all we need to check here is loader->frame()->isMainFrame()
-    // and we don't need "frame" at all.
-    if (!frame->page()->mainFrame()->isLocalFrame())
-        return;
-    LocalFrame* mainFrame = frame->page()->deprecatedLocalMainFrame();
+    LocalFrame* mainFrame = m_pageAgent->mainFrame();
     if (loader->frame() != mainFrame) {
         invalidateFrameOwnerElement(loader->frame());
         return;
@@ -2134,9 +2129,7 @@ void InspectorDOMAgent::frameDocumentUpdated(LocalFrame* frame)
     if (!document)
         return;
 
-    Page* page = frame->page();
-    ASSERT(page);
-    if (frame != page->mainFrame())
+    if (frame != m_pageAgent->mainFrame())
         return;
 
     // Only update the main frame document, nested frame document updates are not required
@@ -2242,7 +2235,7 @@ void InspectorDOMAgent::pushNodesByBackendIdsToFrontend(ErrorString* errorString
         }
 
         Node* node = InspectorNodeIds::nodeForId(backendNodeId);
-        if (node && node->document().page() == m_pageAgent->page())
+        if (node && node->document().frame()->instrumentingAgents() == m_pageAgent->mainFrame()->instrumentingAgents())
             result->addItem(pushNodePathToFrontend(node));
         else
             result->addItem(0);