DoubleTap Zoom support for Mobile Viewport pages

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index e0540017123d77acb24a7e675abe5d4137b8b1be..d920206bf3e0d418cba60c454bae5e3e5df4e85b 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1822,7 +1822,10 @@ bool RenderWidgetHostImpl::OnSwapCompositorFrame(
 
   latency_tracker_.OnSwapCompositorFrame(&frame.metadata.latency_info);
 
-  bool is_mobile_optimized = IsMobileOptimizedFrame(frame.metadata);
+  bool force_enable_zoom =
+      RenderViewHost::From(this)->GetWebkitPreferences().force_enable_zoom;
+  bool is_mobile_optimized =
+      IsMobileOptimizedFrame(frame->metadata, force_enable_zoom);
   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
   if (touch_emulator_)
     touch_emulator_->SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);