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

Source/core/inspector/PageRuntimeAgent.cpp

Index: Source/core/inspector/PageRuntimeAgent.cpp
diff --git a/Source/core/inspector/PageRuntimeAgent.cpp b/Source/core/inspector/PageRuntimeAgent.cpp
index b0d4d28ba2001d1934f2229ea45de7c517a967b8..9b4f937f1e762f0503a71cbdfb1520fe082b5243 100644
--- a/Source/core/inspector/PageRuntimeAgent.cpp
+++ b/Source/core/inspector/PageRuntimeAgent.cpp
@@ -48,10 +48,9 @@ namespace blink {
 
 static int s_nextDebuggerId = 1;
 
-PageRuntimeAgent::PageRuntimeAgent(InjectedScriptManager* injectedScriptManager, InspectorClient* client, ScriptDebugServer* scriptDebugServer, Page* page, InspectorPageAgent* pageAgent)
+PageRuntimeAgent::PageRuntimeAgent(InjectedScriptManager* injectedScriptManager, InspectorClient* client, ScriptDebugServer* scriptDebugServer, InspectorPageAgent* pageAgent)
     : InspectorRuntimeAgent(injectedScriptManager, scriptDebugServer)
     , m_client(client)
-    , m_inspectedPage(page)
     , m_pageAgent(pageAgent)
     , m_mainWorldContextCreated(false)
     , m_debuggerId(s_nextDebuggerId++)
@@ -67,7 +66,6 @@ PageRuntimeAgent::~PageRuntimeAgent()
 
 void PageRuntimeAgent::trace(Visitor* visitor)
 {
-    visitor->trace(m_inspectedPage);
     visitor->trace(m_pageAgent);
     InspectorRuntimeAgent::trace(visitor);
 }
@@ -137,7 +135,7 @@ void PageRuntimeAgent::willReleaseScriptContext(LocalFrame* frame, ScriptState*
 InjectedScript PageRuntimeAgent::injectedScriptForEval(ErrorString* errorString, const int* executionContextId)
 {
     if (!executionContextId) {
-        ScriptState* scriptState = ScriptState::forMainWorld(m_inspectedPage->deprecatedLocalMainFrame());
+        ScriptState* scriptState = ScriptState::forMainWorld(m_pageAgent->inspectedFrame());
         InjectedScript result = injectedScriptManager()->injectedScriptFor(scriptState);
         if (result.isEmpty())
             *errorString = "Internal error: main world execution context not found.";
@@ -162,7 +160,7 @@ void PageRuntimeAgent::unmuteConsole()
 void PageRuntimeAgent::reportExecutionContextCreation()
 {
     Vector<std::pair<ScriptState*, SecurityOrigin*> > isolatedContexts;
-    for (Frame* frame = m_inspectedPage->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+    for (Frame* frame = m_pageAgent->inspectedFrame(); frame; frame = frame->tree().traverseNext(m_pageAgent->inspectedFrame())) {
         if (!frame->isLocalFrame())
             continue;
         LocalFrame* localFrame = toLocalFrame(frame);