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

Source/core/inspector/InspectorResourceAgent.cpp

Index: Source/core/inspector/InspectorResourceAgent.cpp
diff --git a/Source/core/inspector/InspectorResourceAgent.cpp b/Source/core/inspector/InspectorResourceAgent.cpp
index e01af05173ff8f88fa4b2a990ee8d6dc115900ed..9430e9408813680afbcce9f139b2afc0e07da6e7 100644
--- a/Source/core/inspector/InspectorResourceAgent.cpp
+++ b/Source/core/inspector/InspectorResourceAgent.cpp
@@ -910,7 +910,7 @@
     m_state->setBoolean(ResourceAgentState::cacheDisabled, cacheDisabled);
     if (cacheDisabled)
         memoryCache()->evictResources();
-    for (Frame* frame = m_pageAgent->inspectedFrame(); frame; frame = frame->tree().traverseNext()) {
+    for (Frame* frame = m_pageAgent->mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame())
             toLocalFrame(frame)->document()->fetcher()->garbageCollectDocumentResources();
     }
@@ -923,7 +923,7 @@
 void InspectorResourceAgent::loadResourceForFrontend(ErrorString* errorString, const String& url, const RefPtr<JSONObject>* requestHeaders, PassRefPtrWillBeRawPtr<LoadResourceForFrontendCallback> prpCallback)
 {
     RefPtrWillBeRawPtr<LoadResourceForFrontendCallback> callback = prpCallback;
-    Frame* frame = m_pageAgent->inspectedFrame();
+    Frame* frame = m_pageAgent->page()->mainFrame();
     if (!frame || !frame->isLocalFrame()) {
         *errorString = "No frame to use as a loader found";
         return;
@@ -972,7 +972,7 @@
 
 void InspectorResourceAgent::didCommitLoad(LocalFrame* frame, DocumentLoader* loader)
 {
-    if (loader->frame() != m_pageAgent->inspectedFrame())
+    if (loader->frame() != frame->page()->mainFrame())
         return;
 
     if (m_state->getBoolean(ResourceAgentState::cacheDisabled))