PlzNavigate: have renderer-initiated navigations be same-process

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index b9328a40b2539c35bda23a47ff0299f2e67c4949..a71735301c616826f817e3f3de5158f62471c46c 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -720,9 +720,16 @@ RenderFrameHostImpl* RenderFrameHostManager::GetFrameHostForNavigation(
   // The appropriate RenderFrameHost to commit the navigation.
   RenderFrameHostImpl* navigation_rfh = nullptr;
 
-  // TODO(carlosk): do not swap processes for renderer initiated navigations
+  // TODO(carlosk): Renderer-initiated navigations that may require a
+  // SiteInstance swap are sent to the browser via the OpenURL IPC, and are
+  // afterwards treated as browser-initiated navigations. The only
+  // NavigationRequests marked as renderer-initiated are created by receiving a
+  // BeginNavigation IPC, and will then proceed in the same renderer that sent
+  // the IPC due to the condition below. Once there is support for cross-process

[clamy, 2015/03/06 15:57:50]

I prefer leaving the former TODO here.

[carlosk, 2015/03/06 16:34:08]

Done.

+  // scripting check for non-browser-initiated navigations should be removed
   // (see crbug.com/440266).
   if (current_site_instance == dest_site_instance.get() ||
+      !request.browser_initiated() ||
       (!frame_tree_node_->IsMainFrame() &&
        !base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kSitePerProcess))) {