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

Source/core/inspector/InspectorTracingAgent.cpp

 //
 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 
 #include "config.h"
 
 #include "core/inspector/InspectorTracingAgent.h"
 
 #include "core/inspector/IdentifiersFactory.h"
 #include "core/inspector/InspectorClient.h"
-#include "core/inspector/InspectorPageAgent.h"
 #include "core/inspector/InspectorState.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/inspector/InspectorWorkerAgent.h"
+#include "core/page/Page.h"
 #include "platform/TraceEvent.h"
 
 namespace blink {
 
 namespace TracingAgentState {
 const char sessionId[] = "sessionId";
 }
 
 namespace {
 const char devtoolsMetadataEventCategory[] = TRACE_DISABLED_BY_DEFAULT("devtools.timeline");
 }
 
-InspectorTracingAgent::InspectorTracingAgent(InspectorClient* client, InspectorWorkerAgent* workerAgent, InspectorPageAgent* pageAgent)
+InspectorTracingAgent::InspectorTracingAgent(InspectorClient* client, InspectorWorkerAgent* workerAgent, Page* page)
     : InspectorBaseAgent<InspectorTracingAgent>("Tracing")
     , m_layerTreeId(0)
     , m_client(client)
     , m_frontend(0)
     , m_workerAgent(workerAgent)
-    , m_pageAgent(pageAgent)
+    , m_page(page)
 {
 }
 
 void InspectorTracingAgent::trace(Visitor* visitor)
 {
     visitor->trace(m_workerAgent);
-    visitor->trace(m_pageAgent);
+    visitor->trace(m_page);
     InspectorBaseAgent<InspectorTracingAgent>::trace(visitor);
 }
 
 void InspectorTracingAgent::restore()
 {
     emitMetadataEvents();
 }
 
 void InspectorTracingAgent::start(ErrorString*, const String* categoryFilter, const String*, const double*, PassRefPtrWillBeRawPtr<StartCallback> callback)
 {
@@ skipping 11 matching lines @@
     callback->sendSuccess();
 }
 
 String InspectorTracingAgent::sessionId()
 {
     return m_state->getString(TracingAgentState::sessionId);
 }
 
 void InspectorTracingAgent::emitMetadataEvents()
 {
-    TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "TracingStartedInPage", "data", InspectorTracingStartedInFrame::data(sessionId(), m_pageAgent->inspectedFrame()));
+    TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "TracingStartedInPage", "data", InspectorTracingStartedInPage::data(sessionId(), m_page));
     if (m_layerTreeId)
         setLayerTreeId(m_layerTreeId);
     m_workerAgent->setTracingSessionId(sessionId());
 }
 
 void InspectorTracingAgent::setLayerTreeId(int layerTreeId)
 {
     m_layerTreeId = layerTreeId;
     TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "SetLayerTreeId", "data", InspectorSetLayerTreeId::data(sessionId(), m_layerTreeId));
 }
 
 void InspectorTracingAgent::setFrontend(InspectorFrontend* frontend)
 {
     m_frontend = frontend->tracing();
 }
 
 void InspectorTracingAgent::clearFrontend()
 {
     resetSessionId();
 }
 
 void InspectorTracingAgent::resetSessionId()
 {
     m_state->remove(TracingAgentState::sessionId);
     m_workerAgent->setTracingSessionId(sessionId());
 }
 
 }