[Extensions] Remove ExtensionFunction usage of RenderViewHost

extensions/browser/guest_view/web_view/web_view_guest.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 "extensions/browser/guest_view/web_view/web_view_guest.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 423 matching lines @@
 }
 
 void WebViewGuest::EmbedderFullscreenToggled(bool entered_fullscreen) {
   is_embedder_fullscreen_ = entered_fullscreen;
   // If the embedder has got out of fullscreen, we get out of fullscreen
   // mode as well.
   if (!entered_fullscreen)
     SetFullscreenState(false);
 }
 
+bool WebViewGuest::ZoomPropagatesFromEmbedderToGuest() const {
+  // We use the embedder's zoom iff we haven't set a zoom ourselves using
+  // e.g. webview.setZoom().
+  return !did_set_explicit_zoom_;
+}
+
 const char* WebViewGuest::GetAPINamespace() const {
   return webview::kAPINamespace;
 }
 
 int WebViewGuest::GetTaskPrefix() const {
   return IDS_EXTENSION_TASK_MANAGER_WEBVIEW_TAG_PREFIX;
 }
 
 void WebViewGuest::GuestDestroyed() {
   RemoveWebViewStateFromIOThread(web_contents());
@@ skipping 320 matching lines @@
       rules_registry_id_(RulesRegistryService::kInvalidRulesRegistryID),
       find_helper_(this),
       is_overriding_user_agent_(false),
       allow_transparency_(false),
       javascript_dialog_helper_(this),
       allow_scaling_(false),
       is_guest_fullscreen_(false),
       is_embedder_fullscreen_(false),
       last_fullscreen_permission_was_allowed_by_embedder_(false),
       pending_zoom_factor_(0.0),
+      did_set_explicit_zoom_(false),
       weak_ptr_factory_(this) {
   web_view_guest_delegate_.reset(
       ExtensionsAPIClient::Get()->CreateWebViewGuestDelegate(this));
 }
 
 WebViewGuest::~WebViewGuest() {
 }
 
 void WebViewGuest::DidCommitProvisionalLoadForFrame(
     content::RenderFrameHost* render_frame_host,
@@ skipping 354 matching lines @@
 
 void WebViewGuest::SetName(const std::string& name) {
   if (name_ == name)
     return;
   name_ = name;
 
   Send(new ExtensionMsg_SetFrameName(routing_id(), name_));
 }
 
 void WebViewGuest::SetZoom(double zoom_factor) {
+  did_set_explicit_zoom_ = true;
   auto* zoom_controller = ZoomController::FromWebContents(web_contents());
   DCHECK(zoom_controller);
   double zoom_level = content::ZoomFactorToZoomLevel(zoom_factor);
   zoom_controller->SetZoomLevel(zoom_level);
 }
 
 void WebViewGuest::SetZoomMode(ZoomController::ZoomMode zoom_mode) {
   ZoomController::FromWebContents(web_contents())->SetZoomMode(zoom_mode);
 }
 
@@ skipping 331 matching lines @@
     std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
     DispatchEventToView(base::WrapUnique(
         new GuestViewEvent(webview::kEventExitFullscreen, std::move(args))));
   }
   // Since we changed fullscreen state, sending a Resize message ensures that
   // renderer/ sees the change.
   web_contents()->GetRenderViewHost()->GetWidget()->WasResized();
 }
 
 }  // namespace extensions