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..3132250bc958515064820c514532e43e8ebff9a2 100644
--- a/public/web/WebWidget.h
+++ b/public/web/WebWidget.h
@@ -138,11 +138,12 @@ 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) { }

[aelias_OOO_until_Jul13, 2014/09/05 00:22:07]

I assume you want to land the Blink side first.  In that case, this method needs
to keep existing for now for a clean roll (just make it call applyViewportDeltas
with topControlsDelta = 0).

[bokan, 2014/09/05 01:05:40]

Done.

+    // Applies viewport related properties during a commit from the compositor
+    // thread.
+    virtual void applyViewportDeltas(
+        const WebSize& scrollDelta,
+        float scaleFactor,
+        float topControlsDelta) { }
 
     // Called to inform the WebWidget that mouse capture was lost.
     virtual void mouseCaptureLost() { }