Devtools: Margin resizer in overlay experiment

Source/web/InspectorOverlayImpl.h

Index: Source/web/InspectorOverlayImpl.h
diff --git a/Source/web/InspectorOverlayImpl.h b/Source/web/InspectorOverlayImpl.h
index 23f814cf20e366c712b8ac6cc2716fbb9a027724..c0382fb939b1d9266fff8d14ec70666ae3028006 100644
--- a/Source/web/InspectorOverlayImpl.h
+++ b/Source/web/InspectorOverlayImpl.h
@@ -55,7 +55,7 @@ class Node;
 class Page;
 class WebViewImpl;
 
-class InspectorOverlayImpl final : public NoBaseWillBeGarbageCollectedFinalized<InspectorOverlayImpl>, public InspectorOverlay, public WebPageOverlay, public InspectorOverlayHost::Listener {
+class InspectorOverlayImpl final : public NoBaseWillBeGarbageCollectedFinalized<InspectorOverlayImpl>, public InspectorOverlay, public WebPageOverlay, public InspectorOverlayHost::Listener, public InspectorOverlayHost::CSSListener{
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(InspectorOverlayImpl);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(InspectorOverlayImpl);
 public:
@@ -79,6 +79,8 @@ public:
     void highlightQuad(PassOwnPtr<FloatQuad>, const InspectorHighlightConfig&) override;
     void showAndHideViewSize(bool showGrid) override;
     void setListener(InspectorOverlay::Listener* listener) override { m_listener = listener; }
+    void setCSSListener(InspectorOverlay::CSSListener* listener) override { m_cssListener = listener; }
+
     void suspendUpdates() override;
     void resumeUpdates() override;
     void clear() override;
@@ -92,6 +94,8 @@ private:
     void overlayResumed() override;
     void overlaySteppedOver() override;
 
+    void updateCSSProperty(long newValue) override;
+
     // WebPageOverlay implementation.
     void paintPageOverlay(WebGraphicsContext*, const WebSize& webViewSize) override;
 
@@ -126,6 +130,8 @@ private:
     int m_suspendCount;
     bool m_updating;
     RawPtrWillBeMember<InspectorOverlay::Listener> m_listener;
+    RawPtrWillBeMember<InspectorOverlay::CSSListener> m_cssListener;
+    int m_initValue;
 };
 
 } // namespace blink