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

content/public/browser/render_widget_host_view_mac_delegate.h

Index: content/public/browser/render_widget_host_view_mac_delegate.h
diff --git a/content/public/browser/render_widget_host_view_mac_delegate.h b/content/public/browser/render_widget_host_view_mac_delegate.h
index d5ddd80dc4853f59034959c71fb8476f5d0a3dbc..06af8254b4eba20625b1d5408297b30ece11acec 100644
--- a/content/public/browser/render_widget_host_view_mac_delegate.h
+++ b/content/public/browser/render_widget_host_view_mac_delegate.h
@@ -27,6 +27,15 @@
 // normal processing should take place.
 - (BOOL)handleEvent:(NSEvent*)event;
 
+// Notification that a wheel event was unhandled.
+- (void)gotUnhandledWheelEvent;
+
+// Notification of scroll offset pinning.
+- (void)scrollOffsetPinnedToLeft:(BOOL)left toRight:(BOOL)right;
+
+// Notification of whether the view has a horizontal scrollbar.
+- (void)setHasHorizontalScrollbar:(BOOL)has_horizontal_scrollbar;
+
 // Provides validation of user interface items. If the return value is NO, then
 // the delegate is unaware of that item and |valid| is undefined.  Otherwise,
 // |valid| contains the validity of the specified item.
@@ -51,11 +60,6 @@
 // 2-finger history swipe in the given direction.
 - (BOOL)canRubberbandLeft:(NSView*)view;
 - (BOOL)canRubberbandRight:(NSView*)view;
-
-// Notification that a wheel event was received.
-// |consumed| indicates whether the renderer or the render_widget_host_view
-// delegate consumed the event.
-- (void)gotWheelEventConsumed:(BOOL)consumed;
 @end
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_MAC_DELEGATE_H_