Make command-zero reset page scale in addition to zoom level

components/ui/zoom/zoom_controller.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 "components/ui/zoom/zoom_controller.h"
 
 #include "components/ui/zoom/zoom_event_manager.h"
 #include "components/ui/zoom/zoom_observer.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/navigation_details.h"
@@ skipping 323 matching lines @@
     double zoom_level = GetZoomLevel();
     // We never show a zoom bubble for an event we didn't generate.
     ZoomChangedEventData zoom_change_data(web_contents(), zoom_level,
                                           zoom_level, zoom_mode_,
                                           false /* can_show_bubble */);
     FOR_EACH_OBSERVER(ZoomObserver, observers_,
                       OnZoomChanged(zoom_change_data));
   }
 }
 
+void ZoomController::SetPageScaleFactorIsOneForTesting(bool is_one) {
+  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
+  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
+  host_zoom_map_->SetPageScaleFactorIsOneForView(
+      render_process_id, render_view_id, is_one);
+}
+
+bool ZoomController::PageScaleFactorIsOne() const {
+  return content::HostZoomMap::PageScaleFactorIsOne(web_contents());
+}
+
 }  // namespace ui_zoom