Propagate pageScaleFactor to GuestViews

components/guest_view/browser/guest_view_base.cc

 // Copyright 2014 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/guest_view/browser/guest_view_base.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/guest_view/browser/guest_view_event.h"
 #include "components/guest_view/browser/guest_view_manager.h"
@@ skipping 28 matching lines @@
 
 }  // namespace
 
 SetSizeParams::SetSizeParams() {
 }
 SetSizeParams::~SetSizeParams() {
 }
 
 // This observer ensures that the GuestViewBase destroys itself when its
 // embedder goes away. It also tracks when the embedder's fullscreen is
-// toggled so the guest can change itself accordingly.
+// toggled or when its page scale factor changes so the guest can change
+// itself accordingly.
 class GuestViewBase::OwnerContentsObserver : public WebContentsObserver {
  public:
   OwnerContentsObserver(GuestViewBase* guest,
                         WebContents* embedder_web_contents)
       : WebContentsObserver(embedder_web_contents),
         is_fullscreen_(false),
         destroyed_(false),
         guest_(guest) {}
 
   ~OwnerContentsObserver() override {}
@@ skipping 33 matching lines @@
 
     bool current_fullscreen =
         web_contents()->GetDelegate()->IsFullscreenForTabOrPending(
             web_contents());
     if (is_fullscreen_ && !current_fullscreen) {
       is_fullscreen_ = false;
       guest_->EmbedderFullscreenToggled(is_fullscreen_);
     }
   }
 
+  void OnPageScaleFactorChanged(float page_scale_factor) override {
+    if (destroyed_)
+      return;
+
+    guest_->web_contents()->SetPageScale(page_scale_factor);
+  }
+
  private:
   bool is_fullscreen_;
   bool destroyed_;
   GuestViewBase* guest_;
 
   void Destroy() {
     if (destroyed_)
       return;
     destroyed_ = true;
     guest_->Destroy();
@@ skipping 750 matching lines @@
 
 void GuestViewBase::UpdateGuestSize(const gfx::Size& new_size,
                                     bool due_to_auto_resize) {
   if (due_to_auto_resize)
     GuestSizeChangedDueToAutoSize(guest_size_, new_size);
   DispatchOnResizeEvent(guest_size_, new_size);
   guest_size_ = new_size;
 }
 
 }  // namespace guest_view