DoubleTap Zoom support for Mobile Viewport pages

content/browser/renderer_host/frame_metadata_util.cc

Index: content/browser/renderer_host/frame_metadata_util.cc
diff --git a/content/browser/renderer_host/frame_metadata_util.cc b/content/browser/renderer_host/frame_metadata_util.cc
index 11cf5d2e65e2b5d4de95cc2886549cffb17c3cc3..0b2fc8725c7fc4a94175d955c2f4b24212526597 100644
--- a/content/browser/renderer_host/frame_metadata_util.cc
+++ b/content/browser/renderer_host/frame_metadata_util.cc
@@ -30,8 +30,11 @@ bool HasMobileViewport(const cc::CompositorFrameMetadata& frame_metadata) {
 
 namespace content {
 
-bool IsMobileOptimizedFrame(const cc::CompositorFrameMetadata& frame_metadata) {
-  bool has_mobile_viewport = HasMobileViewport(frame_metadata);
+bool IsMobileOptimizedFrame(const cc::CompositorFrameMetadata& frame_metadata,
+                            bool force_enable_zoom) {
+  bool has_mobile_viewport = false;
+  if (!force_enable_zoom)
+    has_mobile_viewport = HasMobileViewport(frame_metadata);
   bool has_fixed_page_scale = HasFixedPageScale(frame_metadata);
   return has_fixed_page_scale || has_mobile_viewport;
 }