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

Source/core/inspector/InspectorInputAgent.h

Index: Source/core/inspector/InspectorInputAgent.h
diff --git a/Source/core/inspector/InspectorInputAgent.h b/Source/core/inspector/InspectorInputAgent.h
index 7775a7427451546d441d6cbd35b685c4826b9717..3cdf537e16fbcdd126411489d98abb39be2758e9 100644
--- a/Source/core/inspector/InspectorInputAgent.h
+++ b/Source/core/inspector/InspectorInputAgent.h
@@ -38,16 +38,16 @@
 
 namespace blink {
 class InspectorClient;
-class Page;
+class InspectorPageAgent;
 
 typedef String ErrorString;
 
 class InspectorInputAgent final : public InspectorBaseAgent<InspectorInputAgent>, public InspectorBackendDispatcher::InputCommandHandler {
     WTF_MAKE_NONCOPYABLE(InspectorInputAgent);
 public:
-    static PassOwnPtrWillBeRawPtr<InspectorInputAgent> create(Page* page, InspectorClient* client)
+    static PassOwnPtrWillBeRawPtr<InspectorInputAgent> create(InspectorPageAgent* pageAgent, InspectorClient* client)
     {
-        return adoptPtrWillBeNoop(new InspectorInputAgent(page, client));
+        return adoptPtrWillBeNoop(new InspectorInputAgent(pageAgent, client));
     }
 
     virtual ~InspectorInputAgent();
@@ -58,9 +58,9 @@ public:
     virtual void dispatchMouseEvent(ErrorString*, const String& type, int x, int y, const int* modifiers, const double* timestamp, const String* button, const int* clickCount) override;
     virtual void dispatchTouchEvent(ErrorString*, const String& type, const RefPtr<JSONArray>& touchPoints, const int* modifiers, const double* timestamp) override;
 private:
-    InspectorInputAgent(Page*, InspectorClient*);
+    InspectorInputAgent(InspectorPageAgent*, InspectorClient*);
 
-    RawPtrWillBeMember<Page> m_page;
+    RawPtrWillBeMember<InspectorPageAgent> m_pageAgent;
     InspectorClient* m_client;
 };