OOPIF: Data URLs are now rendered in the renderer that initiated the navigation.

content/browser/frame_host/render_frame_host_manager.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 
 #include <list>
 
 #include "base/basictypes.h"
@@ skipping 401 matching lines @@
   // to |bindings|.
   scoped_ptr<WebUIImpl> CreateWebUI(const GURL& url, int bindings);
 
   // Returns true if it is safe to reuse the current WebUI when navigating from
   // |current_entry| to |new_url|.
   bool ShouldReuseWebUI(
       const NavigationEntry* current_entry,
       const GURL& new_url) const;
 
   // Returns the SiteInstance to use for the navigation.
-  SiteInstance* GetSiteInstanceForNavigation(
-      const GURL& dest_url,
-      SiteInstance* dest_instance,
-      ui::PageTransition dest_transition,
-      bool dest_is_restore,
-      bool dest_is_view_source_mode);
+  SiteInstance* GetSiteInstanceForNavigation(const GURL& dest_url,
+                                             SiteInstance* source_instance,
+                                             SiteInstance* dest_instance,
+                                             ui::PageTransition transition,
+                                             bool dest_is_restore,
+                                             bool dest_is_view_source_mode);
 
   // Returns an appropriate SiteInstance object for the given |dest_url|,
   // possibly reusing the current SiteInstance.  If --process-per-tab is used,
   // this is only called when ShouldSwapBrowsingInstancesForNavigation returns
-  // true. |dest_instance| will be used if it is not null.
+  // true.
+  // |source_instance| is the SiteInstance of the frame that initiated the
+  // navigation.
+  // |current_instance| is the SiteInstance of the frame that is currently
+  // navigating.
+  // |dest_instance|, if not null, is a predetermined SiteInstance that'll be
+  // used for the resulting frame.

[Charlie Reis, 2014/12/09 19:14:37]

nit: "resulting frame" seems to imply it could end up in a different
FrameTreeNode.  Let's just say "is a predetermined SiteInstance that will be
used if not null."

[lfg, 2014/12/10 21:53:00]

Done.

   // This is a helper function for GetSiteInstanceForNavigation.
-  SiteInstance* GetSiteInstanceForURL(
-      const GURL& dest_url,
-      SiteInstance* dest_instance,
-      ui::PageTransition dest_transition,
-      bool dest_is_restore,
-      bool dest_is_view_source_mode,
-      SiteInstance* current_instance,
-      bool force_browsing_instance_swap);
+  SiteInstance* GetSiteInstanceForURL(const GURL& dest_url,
+                                      SiteInstance* source_instance,
+                                      SiteInstance* current_instance,
+                                      SiteInstance* dest_instance,
+                                      ui::PageTransition transition,
+                                      bool dest_is_restore,
+                                      bool dest_is_view_source_mode,
+                                      bool force_browsing_instance_swap);
 
   // Determines the appropriate url to use as the current url for SiteInstance
   // selection.
   const GURL& GetCurrentURLForSiteInstance(
       SiteInstance* current_instance,
       NavigationEntry* current_entry);
 
   // Creates a new RenderFrameHostImpl for the |new_instance| and assign it to
   // |pending_render_frame_host_| while respecting the opener route if needed
   // and stores it in pending_render_frame_host_.
@@ skipping 56 matching lines @@
 
   // Helper method to terminate the pending RenderViewHost.
   void CancelPending();
 
   // Helper method to set the active RenderFrameHost. Returns the old
   // RenderFrameHost and updates counts.
   scoped_ptr<RenderFrameHostImpl> SetRenderFrameHost(
       scoped_ptr<RenderFrameHostImpl> render_frame_host);
 
   RenderFrameHostImpl* UpdateStateForNavigate(
-      const GURL& url,
-      SiteInstance* instance,
+      const GURL& dest_url,
+      SiteInstance* source_instance,
+      SiteInstance* dest_instance,
       ui::PageTransition transition,
-      bool is_restore,
-      bool is_view_source_mode,
+      bool dest_is_restore,
+      bool dest_is_view_source_mode,
       const GlobalRequestID& transferred_request_id,
       int bindings);
 
   // Called when a renderer process is starting to close.  We should not
   // schedule new navigations in its swapped out RenderFrameHosts after this.
   void RendererProcessClosing(RenderProcessHost* render_process_host);
 
   // Helper method to delete a RenderFrameProxyHost from the list, if one exists
   // for the given |instance|.
   void DeleteRenderFrameProxyHost(SiteInstance* instance);
@@ skipping 68 matching lines @@
   NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<RenderFrameHostManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_