Add FrameHost mojo service

content/renderer/render_frame_impl.cc

 // Copyright 2013 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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 1132 matching lines @@
   // embedder can call GetWebFrame on any RenderFrame.
   GetContentClient()->renderer()->RenderFrameCreated(this);
 }
 
 void RenderFrameImpl::InitializeBlameContext(RenderFrameImpl* parent_frame) {
   DCHECK(!blame_context_);
   blame_context_ = new FrameBlameContext(this, parent_frame);
   blame_context_->Initialize();
 }
 
+void RenderFrameImpl::OnGotZoomLevel(const GURL& url, double zoom_level) {
+  // TODO(wjmaclean): We should see if this restriction is really necessary,
+  // since it isn't enforced in other parts of the page zoom system (e.g.
+  // when a users changes the zoom of a currently displayed page). Android
+  // has no UI for this, so in theory the following code would normally just use
+  // the default zoom anyways.
+#if !defined(OS_ANDROID)
+  // On Android, page zoom isn't used, and in case of WebView, text zoom is used
+  // for legacy WebView text scaling emulation. Thus, the code that resets
+  // the zoom level from this map will be effectively resetting text zoom level.
+  host_zoom_levels_[url] = zoom_level;
+#endif
+}
+
 RenderWidget* RenderFrameImpl::GetRenderWidget() {
   RenderFrameImpl* local_root =
       RenderFrameImpl::FromWebFrame(frame_->localRoot());
   return local_root->render_widget_.get();
 }
 
 #if defined(ENABLE_PLUGINS)
 void RenderFrameImpl::PepperPluginCreated(RendererPpapiHost* host) {
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_,
                     DidCreatePepperPlugin(host));
@@ skipping 2753 matching lines @@
         request.setHTTPReferrer(referrer, blink::WebReferrerPolicyDefault);
       } else {
         request.setHTTPHeaderField(WebString::fromUTF8(i.name()),
                                    WebString::fromUTF8(i.values()));
       }
     }
   }
 
   if (!render_view_->renderer_preferences_.enable_referrers)
     request.setHTTPReferrer(WebString(), blink::WebReferrerPolicyDefault);
+
+  if (extra_data->is_main_frame()) {
+    frame_host_->GetHostZoomLevel(request_url,
+                                  base::Bind(&RenderFrameImpl::OnGotZoomLevel,
+                                             weak_factory_.GetWeakPtr()));

[dcheng, 2016/05/18 04:46:17]

Why pass the URL through like this? Seems like we could just base::Bind() it on
this end?

[scottmg, 2016/05/18 18:31:44]

I was sort of thinking of a message protocol where it'd be weird to get a
disembodied float response. But totally makes sense here, done.

+  }
 }
 
 void RenderFrameImpl::didReceiveResponse(
     unsigned identifier,
     const blink::WebURLResponse& response) {
   // Only do this for responses that correspond to a provisional data source
   // of the top-most frame.  If we have a provisional data source, then we
   // can't have any sub-resources yet, so we know that this response must
   // correspond to a frame load.
   if (!frame_->provisionalDataSource() || frame_->parent())
@@ skipping 579 matching lines @@
     // Reset the zoom limits in case a plugin had changed them previously. This
     // will also call us back which will cause us to send a message to
     // update WebContentsImpl.
     render_view_->webview()->zoomLimitsChanged(
         ZoomFactorToZoomLevel(kMinimumZoomFactor),
         ZoomFactorToZoomLevel(kMaximumZoomFactor));
 
     // Set zoom level, but don't do it for full-page plugin since they don't use
     // the same zoom settings.
     HostZoomLevels::iterator host_zoom =
-        render_view_->host_zoom_levels_.find(GURL(request.url()));
+        host_zoom_levels_.find(GURL(request.url()));
     if (render_view_->webview()->mainFrame()->isWebLocalFrame() &&
         render_view_->webview()->mainFrame()->document().isPluginDocument()) {
       // Reset the zoom levels for plugins.
       render_view_->SetZoomLevel(0);
     } else {
       // If the zoom level is not found, then do nothing. In-page navigation
       // relies on not changing the zoom level in this case.
-      if (host_zoom != render_view_->host_zoom_levels_.end())
+      if (host_zoom != host_zoom_levels_.end())
         render_view_->SetZoomLevel(host_zoom->second);
     }
 
-    if (host_zoom != render_view_->host_zoom_levels_.end()) {
+    if (host_zoom != host_zoom_levels_.end()) {
       // This zoom level was merely recorded transiently for this load.  We can
       // erase it now.  If at some point we reload this page, the browser will
       // send us a new, up-to-date zoom level.
-      render_view_->host_zoom_levels_.erase(host_zoom);
+      host_zoom_levels_.erase(host_zoom);
     }
 
     // Update contents MIME type for main frame.
     params.contents_mime_type = ds->response().mimeType().utf8();
 
     params.transition = navigation_state->GetTransitionType();
     if (!ui::PageTransitionIsMainFrame(params.transition)) {
       // If the main frame does a load, it should not be reported as a subframe
       // navigation.  This can occur in the following case:
       // 1. You're on a site with frames.
@@ skipping 1460 matching lines @@
 #endif
   return decoder_factory_.get();
 }
 
 void RenderFrameImpl::RegisterMojoServices() {
   // Only main frame have ImageDownloader service.
   if (!frame_->parent()) {
     GetServiceRegistry()->AddService(base::Bind(
         &ImageDownloaderImpl::CreateMojoService, base::Unretained(this)));
   }
+
+  GetServiceRegistry()->ConnectToRemoteService(mojo::GetProxy(&frame_host_));
 }
 
 template <typename Interface>
 void RenderFrameImpl::GetInterface(mojo::InterfaceRequest<Interface> request) {
   GetServiceRegistry()->ConnectToRemoteService(std::move(request));
 }
 
 shell::mojom::InterfaceProviderPtr RenderFrameImpl::ConnectToApplication(
     const GURL& url) {
   if (!connector_)
@@ skipping 107 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content