DoubleTap Zoom support for Mobile Viewport pages

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 1804 matching lines @@
   std::vector<IPC::Message> messages_to_deliver_with_frame;
   messages_to_deliver_with_frame.swap(std::get<2>(param));
 
   if (!ui::LatencyInfo::Verify(frame.metadata.latency_info,
                                "RenderWidgetHostImpl::OnSwapCompositorFrame")) {
     std::vector<ui::LatencyInfo>().swap(frame.metadata.latency_info);
   }
 
   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);
 
   // Ignore this frame if its content has already been unloaded. Source ID
   // is always zero for an OOPIF because we are only concerned with displaying
   // stale graphics on top-level frames. We accept frames that have a source ID
   // greater than |current_content_source_id_| because in some cases the first
   // compositor frame can arrive before the navigation commit message that
   // updates that value.
@@ skipping 711 matching lines @@
     // different from the receiver's.
     file_system_file.url =
         GURL(storage::GetIsolatedFileSystemRootURIString(
                  file_system_url.origin(), filesystem_id, std::string())
                  .append(register_name));
     file_system_file.filesystem_id = filesystem_id;
   }
 }
 
 }  // namespace content