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

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index 28a2fcd5fb29ecdd14b104dce5dc4bb5484aa9e2..466f2c1d633ec8df12d829d80fd4a53d6c02bd4c 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -445,8 +445,9 @@ bool RenderWidgetHostViewBase::IsMouseLocked() {
   return mouse_locked_;
 }
 
-void RenderWidgetHostViewBase::UnhandledWheelEvent(
-    const blink::WebMouseWheelEvent& event) {
+void RenderWidgetHostViewBase::ProcessedWheelEvent(
+    const blink::WebMouseWheelEvent& event,
+    bool consumed) {
   // Most implementations don't need to do anything here.
 }