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

Source/core/inspector/PageDebuggerAgent.cpp

Index: Source/core/inspector/PageDebuggerAgent.cpp
diff --git a/Source/core/inspector/PageDebuggerAgent.cpp b/Source/core/inspector/PageDebuggerAgent.cpp
index 1e8269f92cc5f149a0c73f092f3a2143bb969a36..5adbaf0ad6f80af4f55acfcae6811b765a5ea73c 100644
--- a/Source/core/inspector/PageDebuggerAgent.cpp
+++ b/Source/core/inspector/PageDebuggerAgent.cpp
@@ -84,12 +84,12 @@ void PageDebuggerAgent::disable()
 
 void PageDebuggerAgent::startListeningScriptDebugServer()
 {
-    scriptDebugServer().addListener(this, m_pageAgent->page());
+    scriptDebugServer().addListener(this, m_pageAgent->mainFrame());
 }
 
 void PageDebuggerAgent::stopListeningScriptDebugServer()
 {
-    scriptDebugServer().removeListener(this, m_pageAgent->page());
+    scriptDebugServer().removeListener(this, m_pageAgent->mainFrame());
 }
 
 PageScriptDebugServer& PageDebuggerAgent::scriptDebugServer()
@@ -136,6 +136,7 @@ InjectedScript PageDebuggerAgent::injectedScriptForEval(ErrorString* errorString
 
 void PageDebuggerAgent::didClearDocumentOfWindowObject(LocalFrame* frame)
 {
+    // FIXME: what about nested objects?
     if (frame != m_pageAgent->mainFrame())
         return;
 
@@ -149,8 +150,7 @@ void PageDebuggerAgent::didClearDocumentOfWindowObject(LocalFrame* frame)
 
 void PageDebuggerAgent::didCommitLoad(LocalFrame* frame, DocumentLoader* loader)
 {
-    Frame* mainFrame = frame->page()->deprecatedLocalMainFrame();
-    if (loader->frame() == mainFrame)
+    if (loader->frame() == m_pageAgent->mainFrame())
         pageDidCommitLoad();
 }