mac: History swiping doesn't work right with iframes.

chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm

Index: chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm
diff --git a/chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm b/chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm
index a6b260fbd4a75905f18e445f9faf1c151f3e5931..b64550810c3cc00df7917ca812c244fb8ec72349 100644
--- a/chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm
+++ b/chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.mm
@@ -106,19 +106,8 @@ class SpellCheckObserver : public content::WebContentsObserver {
   return [historySwiper_ handleEvent:event];
 }
 
-// Notification that a wheel event was unhandled.
-- (void)gotUnhandledWheelEvent {
-  [historySwiper_ gotUnhandledWheelEvent];
-}
-
-// Notification of scroll offset pinning.
-- (void)scrollOffsetPinnedToLeft:(BOOL)left toRight:(BOOL)right {
-  [historySwiper_ scrollOffsetPinnedToLeft:left toRight:right];
-}
-
-// Notification of whether the view has a horizontal scrollbar.
-- (void)setHasHorizontalScrollbar:(BOOL)has_horizontal_scrollbar {
-  [historySwiper_ setHasHorizontalScrollbar:has_horizontal_scrollbar];
+- (void)gotWheelEventConsumed:(BOOL)consumed {
+  [historySwiper_ gotWheelEventConsumed:consumed];
 }
 
 // NSWindow events.