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

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 6633b1be6850dcd7980e7b7834dfd6b6f8b44d55..1de04eb321fd633b4d90fc56bae486ffc7b383f5 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -1358,7 +1358,7 @@ bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta)
         return false;
 
     if (!m_viewportConstrainedObjects || m_viewportConstrainedObjects->isEmpty()) {
-        InspectorInstrumentation::didScroll(page());
+        InspectorInstrumentation::didScroll(m_frame.get());
         return true;
     }
 
@@ -1382,7 +1382,7 @@ bool FrameView::scrollContentsFastPath(const IntSize& scrollDelta)
         setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants(layer);
     }
 
-    InspectorInstrumentation::didScroll(page());
+    InspectorInstrumentation::didScroll(m_frame.get());
     return true;
 }
 
@@ -2146,7 +2146,7 @@ void FrameView::sendResizeEventIfNeeded()
     m_frame->document()->enqueueResizeEvent();
 
     if (m_frame->isMainFrame())
-        InspectorInstrumentation::didResizeMainFrame(m_frame->page());
+        InspectorInstrumentation::didResizeMainFrame(m_frame.get());
 }
 
 void FrameView::postLayoutTimerFired(Timer<FrameView>*)