Revert of DevTools: remove dependency of most agents on InspectorPageAgent

Source/core/inspector/InspectorTracingAgent.cpp

Index: Source/core/inspector/InspectorTracingAgent.cpp
diff --git a/Source/core/inspector/InspectorTracingAgent.cpp b/Source/core/inspector/InspectorTracingAgent.cpp
index e2070c75609573bf6a2eba02d91ba9d04e0cf0fb..ba854522b753c9a2be5264fced3c3c157dc624cc 100644
--- a/Source/core/inspector/InspectorTracingAgent.cpp
+++ b/Source/core/inspector/InspectorTracingAgent.cpp
@@ -9,6 +9,7 @@
 #include "core/inspector/InspectorTracingAgent.h"
 
 #include "core/inspector/IdentifiersFactory.h"
+#include "core/inspector/InspectorPageAgent.h"
 #include "core/inspector/InspectorState.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/inspector/InspectorWorkerAgent.h"
@@ -24,19 +25,19 @@
 const char devtoolsMetadataEventCategory[] = TRACE_DISABLED_BY_DEFAULT("devtools.timeline");
 }
 
-InspectorTracingAgent::InspectorTracingAgent(LocalFrame* inspectedFrame, Client* client, InspectorWorkerAgent* workerAgent)
+InspectorTracingAgent::InspectorTracingAgent(Client* client, InspectorWorkerAgent* workerAgent, InspectorPageAgent* pageAgent)
     : InspectorBaseAgent<InspectorTracingAgent, InspectorFrontend::Tracing>("Tracing")
-    , m_inspectedFrame(inspectedFrame)
     , m_layerTreeId(0)
     , m_client(client)
     , m_workerAgent(workerAgent)
+    , m_pageAgent(pageAgent)
 {
 }
 
 DEFINE_TRACE(InspectorTracingAgent)
 {
-    visitor->trace(m_inspectedFrame);
     visitor->trace(m_workerAgent);
+    visitor->trace(m_pageAgent);
     InspectorBaseAgent::trace(visitor);
 }
 
@@ -68,7 +69,7 @@
 
 void InspectorTracingAgent::emitMetadataEvents()
 {
-    TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "TracingStartedInPage", TRACE_EVENT_SCOPE_THREAD, "data", InspectorTracingStartedInFrame::data(sessionId(), m_inspectedFrame));
+    TRACE_EVENT_INSTANT1(devtoolsMetadataEventCategory, "TracingStartedInPage", TRACE_EVENT_SCOPE_THREAD, "data", InspectorTracingStartedInFrame::data(sessionId(), m_pageAgent->inspectedFrame()));
     if (m_layerTreeId)
         setLayerTreeId(m_layerTreeId);
     m_workerAgent->setTracingSessionId(sessionId());