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

Source/core/inspector/InspectorInstrumentation.cpp

Index: Source/core/inspector/InspectorInstrumentation.cpp
diff --git a/Source/core/inspector/InspectorInstrumentation.cpp b/Source/core/inspector/InspectorInstrumentation.cpp
index ccc9b2800731f0053f027e7a95542f28f325ab59..4029db903331a586f9b287da8479a64df5113755 100644
--- a/Source/core/inspector/InspectorInstrumentation.cpp
+++ b/Source/core/inspector/InspectorInstrumentation.cpp
@@ -195,11 +195,9 @@ InspectorTimelineAgent* retrieveTimelineAgent(const InspectorInstrumentationCook
     return 0;
 }
 
-InstrumentingAgents* instrumentingAgentsFor(Page* page)
+InstrumentingAgents* instrumentingAgentsFor(LocalFrame* frame)
 {
-    if (!page)
-        return 0;
-    return instrumentationForPage(page);
+    return frame ? frame->instrumentingAgents() : nullptr;
 }
 
 InstrumentingAgents* instrumentingAgentsFor(EventTarget* eventTarget)
@@ -221,11 +219,6 @@ InstrumentingAgents* instrumentingAgentsFor(WorkerGlobalScope* workerGlobalScope
     return instrumentationForWorkerGlobalScope(workerGlobalScope);
 }
 
-InstrumentingAgents* instrumentingAgentsFor(FrameHost* host)
-{
-    return instrumentationForPage(&host->page());
-}
-
 InstrumentingAgents* instrumentingAgentsForNonDocumentContext(ExecutionContext* context)
 {
     if (context->isWorkerGlobalScope())
@@ -254,12 +247,6 @@ const char PageId[] = "pageId";
 const char CallbackName[] = "callbackName";
 };
 
-InstrumentingAgents* instrumentationForPage(Page* page)
-{
-    ASSERT(isMainThread());
-    return page->inspectorController().m_instrumentingAgents.get();
-}
-
 InstrumentingAgents* instrumentationForWorkerGlobalScope(WorkerGlobalScope* workerGlobalScope)
 {
     if (WorkerInspectorController* controller = workerGlobalScope->workerInspectorController())