Delete zoomed_viewport_offset_ and its users.

cc/layer_tree_host.h

Index: cc/layer_tree_host.h
diff --git a/cc/layer_tree_host.h b/cc/layer_tree_host.h
index 24bfa89ec40ced646868c4cb63877a2970f83ab6..a45c1c1ee1e1941313d8b85a4c1bfaad51a9fd0f 100644
--- a/cc/layer_tree_host.h
+++ b/cc/layer_tree_host.h
@@ -176,11 +176,6 @@ public:
     void startPageScaleAnimation(gfx::Vector2d targetOffset, bool useAnchor, float scale, base::TimeDelta duration);
 
     void applyScrollAndScale(const ScrollAndScaleSet&);
-    // This function converts event coordinates when the deviceViewport is zoomed.
-    // Coordinates are transformed from logical pixels in the zoomed viewport to
-    // logical pixels in the un-zoomed viewport, the latter being the coordinates
-    // required for hit-testing.
-    gfx::PointF adjustEventPointForPinchZoom(const gfx::PointF& zoomedViewportPoint) const;
     void setImplTransform(const gfx::Transform&);
 
     void startRateLimiter(WebKit::WebGraphicsContext3D*);