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

Source/core/inspector/InspectorCanvasAgent.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 250 matching lines @@
         *errorString = "Inspected frame has gone";
         return InjectedScriptCanvasModule();
     }
     return injectedScriptCanvasModule(errorString, injectedScript.scriptState());
 }
 
 void InspectorCanvasAgent::findFramesWithUninstrumentedCanvases()
 {
     class NodeVisitor final : public WrappedNodeVisitor {
     public:
-        NodeVisitor(Page* page, FramesWithUninstrumentedCanvases& result)
-            : m_page(page)
+        NodeVisitor(LocalFrame* frame, FramesWithUninstrumentedCanvases& result)
+            : m_frame(frame)
             , m_framesWithUninstrumentedCanvases(result)
         {
         }
 
         virtual void visitNode(Node* node) override
         {
             ASSERT(node);
             if (!isHTMLCanvasElement(*node) || !node->document().frame())
                 return;
 
             LocalFrame* frame = node->document().frame();
-            if (frame->page() != m_page)
+            if (frame->localFrameRoot() != m_frame)
                 return;
 
             if (toHTMLCanvasElement(node)->renderingContext())
                 m_framesWithUninstrumentedCanvases.set(frame, true);
         }
 
     private:
-        Page* m_page;
+        LocalFrame* m_frame;
         FramesWithUninstrumentedCanvases& m_framesWithUninstrumentedCanvases;
-    } nodeVisitor(m_pageAgent->page(), m_framesWithUninstrumentedCanvases);
+    } nodeVisitor(m_pageAgent->mainFrame(), m_framesWithUninstrumentedCanvases);
 
     m_framesWithUninstrumentedCanvases.clear();
     ScriptProfiler::visitNodeWrappers(&nodeVisitor);
 
     if (m_frontend) {
         for (const auto& frame : m_framesWithUninstrumentedCanvases) {
             String frameId = m_pageAgent->frameId(frame.key);
             if (!frameId.isEmpty())
                 m_frontend->contextCreated(frameId);
         }
@@ skipping 46 matching lines @@
     ErrorString error;
     for (const auto& frame : m_framesWithUninstrumentedCanvases) {
         InjectedScriptCanvasModule module = injectedScriptCanvasModule(&error, ScriptState::forMainWorld(frame.key));
         if (!module.isEmpty())
             module.markFrameEnd();
     }
 }
 
 } // namespace blink