Made Blink aware of top controls offset (Blink-side)

public/web/WebWidget.h

Index: public/web/WebWidget.h
diff --git a/public/web/WebWidget.h b/public/web/WebWidget.h
index d0e12437890840de7d3f096cb11941719c0c1f65..46119a4d8bcb6bc11b5b2332e01028efe9ab5ffc 100644
--- a/public/web/WebWidget.h
+++ b/public/web/WebWidget.h
@@ -75,6 +75,11 @@ public:
     // keyboard to overlay over content but allow scrolling it into view.
     virtual void resizePinchViewport(const WebSize&) { }
 
+    // Lets Blink know the updated top controls content offset (i.e. how much
+    // the top controls are showing). Should always be 0 on platforms without
+    // top controls.
+    virtual void setTopControlsContentOffset(float) { }

[aelias_OOO_until_Jul13, 2014/09/03 19:28:42]

Looks like nobody calls this in your Chromium-side patch (nor do I think it
would ever be desirable to call it from Chromium) so please remove it from the
WebWidget public API.

[bokan, 2014/09/04 23:10:02]

Done.

+
     // Ends a group of resize events that was started with a call to
     // willStartLiveResize.
     virtual void willEndLiveResize() { }
@@ -138,11 +143,12 @@ public:
     // Check whether the given point hits any registered touch event handlers.
     virtual bool hasTouchEventHandlersAt(const WebPoint&) { return true; }
 
-    // Applies a scroll delta to the root layer, which is bundled with a page
-    // scale factor that may apply a CSS transform on the whole document (used
-    // for mobile-device pinch zooming). This is triggered by events sent to the
-    // compositor thread.
-    virtual void applyScrollAndScale(const WebSize& scrollDelta, float scaleFactor) { }
+    // Applies viewport related properties during a commit from the compositor
+    // thread.
+    virtual void applyViewportProperties(
+        const WebSize& scrollDelta,
+        float scaleFactor,
+        float topControlsDelta) { }
 
     // Called to inform the WebWidget that mouse capture was lost.
     virtual void mouseCaptureLost() { }