Disable zoom bubble for PDF extension.

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 103 matching lines @@
     double old_zoom_level = zoom_level_;
     zoom_level_ = zoom_level;
 
     // TODO(wjmaclean) Do we care about filling in host/scheme here?
     content::HostZoomMap::ZoomLevelChange change;
     change.mode = content::HostZoomMap::ZOOM_CHANGED_TEMPORARY_ZOOM;
     change.zoom_level = zoom_level;
     ZoomEventManager::GetForBrowserContext(browser_context_)
         ->OnZoomLevelChanged(change);
 
+    bool can_show_bubble = can_show_bubble_;
+    if (client && client->ShouldSuppressBubble())
+      can_show_bubble = false;
+
     ZoomChangedEventData zoom_change_data(web_contents(), old_zoom_level,
                                           zoom_level_, zoom_mode_,
-                                          can_show_bubble_);
+                                          can_show_bubble);
     FOR_EACH_OBSERVER(ZoomObserver, observers_,
                       OnZoomChanged(zoom_change_data));
 
     last_client_ = NULL;
     return true;
   }
 
   content::HostZoomMap* zoom_map =
       content::HostZoomMap::GetForWebContents(web_contents());
   DCHECK(zoom_map);
@@ skipping 226 matching lines @@
   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