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

Source/core/inspector/InspectorInspectorAgent.cpp

Index: Source/core/inspector/InspectorInspectorAgent.cpp
diff --git a/Source/core/inspector/InspectorInspectorAgent.cpp b/Source/core/inspector/InspectorInspectorAgent.cpp
index 8334dcec623c1acf8cd7fd91bcdb260429e89755..9ec66423e9feaa554abd6525f9125c8b4e8e3002 100644
--- a/Source/core/inspector/InspectorInspectorAgent.cpp
+++ b/Source/core/inspector/InspectorInspectorAgent.cpp
@@ -52,9 +52,9 @@ namespace InspectorAgentState {
 static const char inspectorAgentEnabled[] = "inspectorAgentEnabled";
 }
 
-InspectorInspectorAgent::InspectorInspectorAgent(Page* page, InjectedScriptManager* injectedScriptManager)
+InspectorInspectorAgent::InspectorInspectorAgent(InspectorController* inspectorController, InjectedScriptManager* injectedScriptManager)
     : InspectorBaseAgent<InspectorInspectorAgent>("Inspector")
-    , m_inspectedPage(page)
+    , m_inspectorController(inspectorController)
     , m_frontend(nullptr)
     , m_injectedScriptManager(injectedScriptManager)
 {
@@ -70,7 +70,7 @@ InspectorInspectorAgent::~InspectorInspectorAgent()
 
 void InspectorInspectorAgent::trace(Visitor* visitor)
 {
-    visitor->trace(m_inspectedPage);
+    visitor->trace(m_inspectorController);
     visitor->trace(m_injectedScriptManager);
     InspectorBaseAgent::trace(visitor);
 }
@@ -131,7 +131,7 @@ void InspectorInspectorAgent::disable(ErrorString*)
 
 void InspectorInspectorAgent::reset(ErrorString*)
 {
-    m_inspectedPage->inspectorController().reconnectFrontend();
+    m_inspectorController->reconnectFrontend();
 }
 
 void InspectorInspectorAgent::domContentLoadedEventFired(LocalFrame* frame)