Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

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 3524a84d030e4d4d13b15f9a3f2b802772c2a9a1..44cbea0a3faa3964a309a9aa2b1b4f7b360f13d7 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -30,7 +30,6 @@
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
-#include "content/browser/webui/web_ui_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "content/common/view_messages.h"
@@ -39,7 +38,6 @@
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
-#include "content/public/browser/web_ui_controller.h"
 #include "content/public/common/browser_plugin_guest_mode.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/referrer.h"
@@ -220,7 +218,6 @@ RenderFrameHostManager::RenderFrameHostManager(
       render_widget_delegate_(render_widget_delegate),
       proxy_hosts_(new RenderFrameProxyHostMap(this)),
       interstitial_page_(nullptr),
-      should_reuse_web_ui_(false),
       weak_factory_(this) {
   DCHECK(frame_tree_node_);
 }
@@ -245,10 +242,6 @@ RenderFrameHostManager::~RenderFrameHostManager() {
   // the current RenderFrameHost and uses it during its destructor.
   ResetProxyHosts();
 
-  // Release the WebUI prior to resetting the current RenderFrameHost, as the
-  // WebUI accesses the RenderFrameHost during cleanup.
-  web_ui_.reset();
-
   // We should always have a current RenderFrameHost except in some tests.
   SetRenderFrameHost(scoped_ptr<RenderFrameHostImpl>());
 }
@@ -265,9 +258,9 @@ void RenderFrameHostManager::Init(BrowserContext* browser_context,
     site_instance = SiteInstance::Create(browser_context);
 
   int flags = delegate_->IsHidden() ? CREATE_RF_HIDDEN : 0;
-  SetRenderFrameHost(CreateRenderFrameHost(site_instance, view_routing_id,
-                                           frame_routing_id, widget_routing_id,
-                                           flags));
+  SetRenderFrameHost(CreateRenderFrameHost(
+      site_instance, view_routing_id, frame_routing_id, widget_routing_id,
+      flags, GURL(), NavigationEntryImpl::kInvalidBindings));
 
   // Notify the delegate of the creation of the current RenderFrameHost.
   // Do this only for subframes, as the main frame case is taken care of by
@@ -351,27 +344,6 @@ void RenderFrameHostManager::RemoveOuterDelegateFrame() {
       outer_delegate_frame_tree_node);
 }
 
-void RenderFrameHostManager::SetPendingWebUI(const GURL& url, int bindings) {
-  pending_web_ui_ = CreateWebUI(url, bindings);
-  pending_and_current_web_ui_.reset();
-}
-
-scoped_ptr<WebUIImpl> RenderFrameHostManager::CreateWebUI(const GURL& url,
-                                                          int bindings) {
-  scoped_ptr<WebUIImpl> new_web_ui(delegate_->CreateWebUIForRenderManager(url));
-
-  // If we have assigned (zero or more) bindings to this NavigationEntry in the
-  // past, make sure we're not granting it different bindings than it had
-  // before.  If so, note it and don't give it any bindings, to avoid a
-  // potential privilege escalation.
-  if (new_web_ui && bindings != NavigationEntryImpl::kInvalidBindings &&
-      new_web_ui->GetBindings() != bindings) {
-    RecordAction(base::UserMetricsAction("ProcessSwapBindingsMismatch_RVHM"));
-    return nullptr;
-  }
-  return new_web_ui.Pass();
-}
-
 RenderFrameHostImpl* RenderFrameHostManager::Navigate(
     const GURL& dest_url,
     const FrameNavigationEntry& frame_entry,
@@ -418,7 +390,7 @@ RenderFrameHostImpl* RenderFrameHostManager::Navigate(
     CreateOpenerProxies(dest_render_frame_host->GetSiteInstance(),
                         frame_tree_node_);
     if (!InitRenderView(dest_render_frame_host->render_view_host(),
-                        MSG_ROUTING_NONE))
+                        MSG_ROUTING_NONE, pending_web_ui()))
       return nullptr;
 
     // Now that we've created a new renderer, be sure to hide it if it isn't
@@ -670,13 +642,12 @@ void RenderFrameHostManager::CommitPendingIfNecessary(
     RenderFrameHostImpl* render_frame_host,
     bool was_caused_by_user_gesture) {
   if (!pending_render_frame_host_ && !speculative_render_frame_host_) {
-    DCHECK_IMPLIES(should_reuse_web_ui_, web_ui_);
 
     // We should only hear this from our current renderer.
     DCHECK_EQ(render_frame_host_, render_frame_host);
 
-    // Even when there is no pending RVH, there may be a pending Web UI.
-    if (pending_web_ui() || speculative_web_ui_)
+    // If current RenderFrameHost has a pending WebUI, commit it.
+    if (render_frame_host_->pending_web_ui())
       CommitPending();
     return;
   }
@@ -1012,21 +983,12 @@ RenderFrameHostImpl* RenderFrameHostManager::GetFrameHostForNavigation(
     CleanUpNavigation();
     navigation_rfh = render_frame_host_.get();
 
-    // As SiteInstances are the same, check if the WebUI should be reused.
-    const NavigationEntry* current_navigation_entry =
-        delegate_->GetLastCommittedNavigationEntryForRenderManager();
-    should_reuse_web_ui_ = ShouldReuseWebUI(current_navigation_entry,
-                                            request.common_params().url);
-    if (!should_reuse_web_ui_) {
-      speculative_web_ui_ = CreateWebUI(request.common_params().url,
-                                        request.bindings());
-      // Make sure the current RenderViewHost has the right bindings.
-      if (speculative_web_ui() &&
-          !render_frame_host_->GetProcess()->IsForGuestsOnly()) {
-        render_frame_host_->render_view_host()->AllowBindings(
-            speculative_web_ui()->GetBindings());
-      }
-    }
+    // As SiteInstances are the same, make the RFH update its possible pending
+    // WebUI.
+    render_frame_host_->UpdatePendingWebUI(request.common_params().url,
+                                           request.bindings());
+    DCHECK(!speculative_render_frame_host_);
+    DCHECK(speculative_web_ui() == render_frame_host_->pending_web_ui());
   } else {
     // If the SiteInstance for the final URL doesn't match the one from the
     // speculatively created RenderFrameHost, create a new RenderFrameHost using
@@ -1039,8 +1001,18 @@ RenderFrameHostImpl* RenderFrameHostManager::GetFrameHostForNavigation(
           request.common_params().url, current_site_instance,
           dest_site_instance.get(), request.bindings());
       DCHECK(success);
+    } else {
+      // When reusing an existing speculative RenderFrameHost its active WebUI
+      // must be updated to make sure it matches the current URL. As it is not a
+      // new RenderFrameHost instance it must be done by updating the pending
+      // WebUI and immediately making it active.
+      speculative_render_frame_host_->UpdatePendingWebUI(
+          request.common_params().url, request.bindings());
+      speculative_render_frame_host_->CommitPendingWebUI();
     }
     DCHECK(speculative_render_frame_host_);
+    DCHECK_EQ(speculative_web_ui(), speculative_render_frame_host_->web_ui());
+
     navigation_rfh = speculative_render_frame_host_.get();
 
     // Check if our current RFH is live.
@@ -1062,7 +1034,8 @@ RenderFrameHostImpl* RenderFrameHostManager::GetFrameHostForNavigation(
   if (!navigation_rfh->IsRenderFrameLive()) {
     // Recreate the opener chain.
     CreateOpenerProxies(navigation_rfh->GetSiteInstance(), frame_tree_node_);
-    if (!InitRenderView(navigation_rfh->render_view_host(), MSG_ROUTING_NONE)) {
+    if (!InitRenderView(navigation_rfh->render_view_host(), MSG_ROUTING_NONE,
+                        speculative_web_ui())) {
       return nullptr;
     }
 
@@ -1085,8 +1058,7 @@ RenderFrameHostImpl* RenderFrameHostManager::GetFrameHostForNavigation(
 void RenderFrameHostManager::CleanUpNavigation() {
   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableBrowserSideNavigation));
-  speculative_web_ui_.reset();
-  should_reuse_web_ui_ = false;
+  render_frame_host_->DiscardPendingWebUI();
   if (speculative_render_frame_host_)
     DiscardUnusedFrame(UnsetSpeculativeRenderFrameHost());
 }
@@ -1270,18 +1242,6 @@ bool RenderFrameHostManager::ShouldSwapBrowsingInstancesForNavigation(
   return false;
 }
 
-bool RenderFrameHostManager::ShouldReuseWebUI(
-    const NavigationEntry* current_entry,
-    const GURL& new_url) const {
-  NavigationControllerImpl& controller =
-      delegate_->GetControllerForRenderManager();
-  return current_entry && web_ui_ &&
-      (WebUIControllerFactoryRegistry::GetInstance()->GetWebUIType(
-          controller.GetBrowserContext(), current_entry->GetURL()) ==
-       WebUIControllerFactoryRegistry::GetInstance()->GetWebUIType(
-          controller.GetBrowserContext(), new_url));
-}
-
 SiteInstance* RenderFrameHostManager::GetSiteInstanceForNavigation(
     const GURL& dest_url,
     SiteInstance* source_instance,
@@ -1595,7 +1555,9 @@ const GURL& RenderFrameHostManager::GetCurrentURLForSiteInstance(
 
 void RenderFrameHostManager::CreatePendingRenderFrameHost(
     SiteInstance* old_instance,
-    SiteInstance* new_instance) {
+    SiteInstance* new_instance,
+    const GURL& url,
+    int bindings) {
   int create_render_frame_flags = 0;
   if (delegate_->IsHidden())
     create_render_frame_flags |= CREATE_RF_HIDDEN;
@@ -1613,8 +1575,8 @@ void RenderFrameHostManager::CreatePendingRenderFrameHost(
   CreateProxiesForNewRenderFrameHost(old_instance, new_instance);
 
   // Create a non-swapped-out RFH with the given opener.
-  pending_render_frame_host_ = CreateRenderFrame(
-      new_instance, pending_web_ui(), create_render_frame_flags, nullptr);
+  pending_render_frame_host_ = CreateRenderFrameInternal(
+      new_instance, url, bindings, create_render_frame_flags, nullptr);
 }
 
 void RenderFrameHostManager::CreateProxiesForNewRenderFrameHost(
@@ -1670,7 +1632,9 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrameHost(
     int32 view_routing_id,
     int32 frame_routing_id,
     int32 widget_routing_id,
-    int flags) {
+    int flags,
+    const GURL& dest_url,
+    int entry_bindings) {
   if (frame_routing_id == MSG_ROUTING_NONE)
     frame_routing_id = site_instance->GetProcess()->GetNextRoutingID();
 
@@ -1691,7 +1655,7 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrameHost(
   return RenderFrameHostFactory::Create(
       site_instance, render_view_host, render_frame_delegate_,
       render_widget_delegate_, frame_tree, frame_tree_node_, frame_routing_id,
-      widget_routing_id, flags);
+      widget_routing_id, flags, dest_url, entry_bindings);
 }
 
 // PlzNavigate
@@ -1702,12 +1666,6 @@ bool RenderFrameHostManager::CreateSpeculativeRenderFrameHost(
     int bindings) {
   CHECK(new_instance);
   CHECK_NE(old_instance, new_instance);
-  CHECK(!should_reuse_web_ui_);
-
-  // Note: |speculative_web_ui_| must be initialized before starting the
-  // |speculative_render_frame_host_| creation steps otherwise the WebUI
-  // won't be properly initialized.
-  speculative_web_ui_ = CreateWebUI(url, bindings);
 
   // The process for the new SiteInstance may (if we're sharing a process with
   // another host that already initialized it) or may not (we have our own
@@ -1721,22 +1679,27 @@ bool RenderFrameHostManager::CreateSpeculativeRenderFrameHost(
   int create_render_frame_flags = 0;
   if (delegate_->IsHidden())
     create_render_frame_flags |= CREATE_RF_HIDDEN;
-  speculative_render_frame_host_ =
-      CreateRenderFrame(new_instance, speculative_web_ui_.get(),
-                        create_render_frame_flags, nullptr);
+  speculative_render_frame_host_ = CreateRenderFrameInternal(
+      new_instance, url, bindings, create_render_frame_flags, nullptr);
 
-  if (!speculative_render_frame_host_) {
-    speculative_web_ui_.reset();
-    return false;
-  }
   return true;
 }
 
 scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrame(
     SiteInstance* instance,
-    WebUIImpl* web_ui,
     int flags,
     int* view_routing_id_ptr) {
+  return CreateRenderFrameInternal(instance, GURL(),
+                                   NavigationEntryImpl::kInvalidBindings, flags,
+                                   view_routing_id_ptr);
+}
+
+scoped_ptr<RenderFrameHostImpl>
+RenderFrameHostManager::CreateRenderFrameInternal(SiteInstance* instance,
+                                                  const GURL& url,
+                                                  int bindings,
+                                                  int flags,
+                                                  int* view_routing_id_ptr) {
   bool swapped_out = !!(flags & CREATE_RF_SWAPPED_OUT);
   bool swapped_out_forbidden =
       SiteIsolationPolicy::IsSwappedOutStateForbidden();
@@ -1771,6 +1734,8 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrame(
     // Prevent the process from exiting while we're trying to use it.
     if (!swapped_out) {
       new_render_frame_host = proxy->PassFrameHostOwnership();
+      new_render_frame_host->UpdatePendingWebUI(url, bindings);
+      new_render_frame_host->CommitPendingWebUI();
       new_render_frame_host->GetProcess()->AddPendingView();
 
       proxy_hosts_->Remove(instance->GetId());
@@ -1794,8 +1759,9 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrame(
       widget_routing_id = instance->GetProcess()->GetNextRoutingID();
     }
 
-    new_render_frame_host = CreateRenderFrameHost(
-        instance, MSG_ROUTING_NONE, MSG_ROUTING_NONE, widget_routing_id, flags);
+    new_render_frame_host =
+        CreateRenderFrameHost(instance, MSG_ROUTING_NONE, MSG_ROUTING_NONE,
+                              widget_routing_id, flags, url, bindings);
     RenderViewHostImpl* render_view_host =
         new_render_frame_host->render_view_host();
     int proxy_routing_id = MSG_ROUTING_NONE;
@@ -1814,7 +1780,9 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrame(
     }
 
     if (frame_tree_node_->IsMainFrame()) {
-      success = InitRenderView(render_view_host, proxy_routing_id);
+      success = InitRenderView(
+          render_view_host, proxy_routing_id,
+          swapped_out ? nullptr : new_render_frame_host->web_ui());
 
       // If we are reusing the RenderViewHost and it doesn't already have a
       // RenderWidgetHostView, we need to create one if this is the main frame.
@@ -1853,21 +1821,6 @@ scoped_ptr<RenderFrameHostImpl> RenderFrameHostManager::CreateRenderFrame(
     }
   }
 
-  // When a new RenderView is created by the renderer process, the new
-  // WebContents gets a RenderViewHost in the SiteInstance of its opener
-  // WebContents. If not used in the first navigation, this RVH is swapped out
-  // and is not granted bindings, so we may need to grant them when swapping it
-  // in.
-  if (web_ui && !new_render_frame_host->GetProcess()->IsForGuestsOnly()) {
-    int required_bindings = web_ui->GetBindings();
-    RenderViewHost* render_view_host =
-        new_render_frame_host->render_view_host();
-    if ((render_view_host->GetEnabledBindings() & required_bindings) !=
-            required_bindings) {
-      render_view_host->AllowBindings(required_bindings);
-    }
-  }
-
   // Returns the new RFH if it isn't swapped out.
   if (success && !swapped_out) {
     DCHECK(new_render_frame_host->GetSiteInstance() == instance);
@@ -1908,7 +1861,7 @@ int RenderFrameHostManager::CreateRenderFrameProxy(SiteInstance* instance) {
 
   if (SiteIsolationPolicy::IsSwappedOutStateForbidden() &&
       frame_tree_node_->IsMainFrame()) {
-    InitRenderView(render_view_host, proxy->GetRoutingID());
+    InitRenderView(render_view_host, proxy->GetRoutingID(), nullptr);
     proxy->set_render_frame_proxy_created(true);
   } else {
     proxy->InitRenderFrameProxy();
@@ -1943,7 +1896,7 @@ void RenderFrameHostManager::EnsureRenderViewInitialized(
   if (!proxy)
     return;
 
-  InitRenderView(render_view_host, proxy->GetRoutingID());
+  InitRenderView(render_view_host, proxy->GetRoutingID(), nullptr);
   proxy->set_render_frame_proxy_created(true);
 }
 
@@ -1978,7 +1931,8 @@ void RenderFrameHostManager::SetRWHViewForInnerContents(
 
 bool RenderFrameHostManager::InitRenderView(
     RenderViewHostImpl* render_view_host,
-    int proxy_routing_id) {
+    int proxy_routing_id,
+    WebUIImpl* dest_web_ui) {
   // Ensure the renderer process is initialized before creating the
   // RenderView.
   if (!render_view_host->GetProcess()->Init())
@@ -1988,26 +1942,13 @@ bool RenderFrameHostManager::InitRenderView(
   if (render_view_host->IsRenderViewLive())
     return true;
 
-  // If the ongoing navigation is to a WebUI and the RenderView is not in a
-  // guest process, tell the RenderViewHost about any bindings it will need
-  // enabled.
-  WebUIImpl* dest_web_ui = nullptr;
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableBrowserSideNavigation)) {
-    dest_web_ui =
-        should_reuse_web_ui_ ? web_ui_.get() : speculative_web_ui_.get();
-  } else {
-    dest_web_ui = pending_web_ui();
-  }
-  if (dest_web_ui && !render_view_host->GetProcess()->IsForGuestsOnly()) {
-    render_view_host->AllowBindings(dest_web_ui->GetBindings());
-  } else {
-    // Ensure that we don't create an unprivileged RenderView in a WebUI-enabled
-    // process unless it's swapped out.
-    if (render_view_host->is_active()) {
-      CHECK(!ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
-                render_view_host->GetProcess()->GetID()));
-    }
+  // If the ongoing navigation is not to a WebUI or the RenderView is in a
+  // guest process, ensure that we don't create an unprivileged RenderView in a
+  // WebUI-enabled process unless it's swapped out.
+  if ((!dest_web_ui || render_view_host->GetProcess()->IsForGuestsOnly()) &&
+      render_view_host->is_active()) {
+    CHECK(!ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
+        render_view_host->GetProcess()->GetID()));
   }
 
   int opener_frame_routing_id =
@@ -2095,42 +2036,17 @@ int RenderFrameHostManager::GetRoutingIdForSiteInstance(
 void RenderFrameHostManager::CommitPending() {
   TRACE_EVENT1("navigation", "RenderFrameHostManager::CommitPending",
                "FrameTreeNode id", frame_tree_node_->frame_tree_node_id());
-  bool browser_side_navigation =
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableBrowserSideNavigation);
-
   // First check whether we're going to want to focus the location bar after
   // this commit.  We do this now because the navigation hasn't formally
-  // committed yet, so if we've already cleared |pending_web_ui_| the call chain
+  // committed yet, so if we've already cleared the pending WebUI the call chain
   // this triggers won't be able to figure out what's going on.
   bool will_focus_location_bar = delegate_->FocusLocationBarByDefault();
 
-  // Next commit the Web UI, if any. Either replace |web_ui_| with
-  // |pending_web_ui_|, or clear |web_ui_| if there is no pending WebUI, or
-  // leave |web_ui_| as is if reusing it.
-  DCHECK(!(pending_web_ui_ && pending_and_current_web_ui_));
-  if (pending_web_ui_ || speculative_web_ui_) {
-    DCHECK(!should_reuse_web_ui_);
-    web_ui_.reset(browser_side_navigation ? speculative_web_ui_.release()
-                                          : pending_web_ui_.release());
-  } else if (pending_and_current_web_ui_ || should_reuse_web_ui_) {
-    if (browser_side_navigation) {
-      DCHECK(web_ui_);
-      should_reuse_web_ui_ = false;
-    } else {
-      DCHECK_EQ(pending_and_current_web_ui_.get(), web_ui_.get());
-      pending_and_current_web_ui_.reset();
-    }
-  } else {
-    web_ui_.reset();
-  }
-  DCHECK(!speculative_web_ui_);
-  DCHECK(!should_reuse_web_ui_);
-
-  // It's possible for the pending_render_frame_host_ to be nullptr when we
-  // aren't crossing process boundaries. If so, we just needed to handle the Web
-  // UI committing above and we're done.
-  if (!pending_render_frame_host_ && !speculative_render_frame_host_) {
+  // If the current RenderFrameHost has a pending WebUI then just commit it and
+  // return (there should be nothing else to commit).
+  if (render_frame_host_->pending_web_ui()) {
+    DCHECK(!pending_render_frame_host_ && !speculative_render_frame_host_);
+    render_frame_host_->CommitPendingWebUI();
     if (will_focus_location_bar)
       delegate_->SetFocusToLocationBar(false);
     return;
@@ -2147,7 +2063,8 @@ void RenderFrameHostManager::CommitPending() {
   // Swap in the pending or speculative frame and make it active. Also ensure
   // the FrameTree stays in sync.
   scoped_ptr<RenderFrameHostImpl> old_render_frame_host;
-  if (!browser_side_navigation) {
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation)) {
     DCHECK(!speculative_render_frame_host_);
     old_render_frame_host =
         SetRenderFrameHost(pending_render_frame_host_.Pass());
@@ -2309,9 +2226,6 @@ RenderFrameHostImpl* RenderFrameHostManager::UpdateStateForNavigate(
       dest_url, source_instance, dest_instance, nullptr, transition,
       dest_is_restore, dest_is_view_source_mode);
 
-  const NavigationEntry* current_entry =
-      delegate_->GetLastCommittedNavigationEntryForRenderManager();
-
   DCHECK(!pending_render_frame_host_);
 
   if (new_instance.get() != current_instance) {
@@ -2324,14 +2238,8 @@ RenderFrameHostImpl* RenderFrameHostManager::UpdateStateForNavigate(
 
     // New SiteInstance: create a pending RFH to navigate.
 
-    // This will possibly create (set to nullptr) a Web UI object for the
-    // pending page. We'll use this later to give the page special access. This
-    // must happen before the new renderer is created below so it will get
-    // bindings. It must also happen after the above conditional call to
-    // CancelPending(), otherwise CancelPending may clear the pending_web_ui_
-    // and the page will not have its bindings set appropriately.
-    SetPendingWebUI(dest_url, bindings);
-    CreatePendingRenderFrameHost(current_instance, new_instance.get());
+    CreatePendingRenderFrameHost(current_instance, new_instance.get(), dest_url,
+                                 bindings);
     if (!pending_render_frame_host_)
       return nullptr;
 
@@ -2391,23 +2299,7 @@ RenderFrameHostImpl* RenderFrameHostManager::UpdateStateForNavigate(
   // delete the proxy.
   proxy_hosts_->Remove(new_instance.get()->GetId());
 
-  if (ShouldReuseWebUI(current_entry, dest_url)) {
-    pending_web_ui_.reset();
-    pending_and_current_web_ui_ = web_ui_->AsWeakPtr();
-  } else {
-    SetPendingWebUI(dest_url, bindings);
-    // Make sure the new RenderViewHost has the right bindings.
-    if (pending_web_ui() &&
-        !render_frame_host_->GetProcess()->IsForGuestsOnly()) {
-      render_frame_host_->render_view_host()->AllowBindings(
-          pending_web_ui()->GetBindings());
-    }
-  }
-
-  if (pending_web_ui() && render_frame_host_->IsRenderFrameLive()) {
-    pending_web_ui()->RenderViewReused(render_frame_host_->render_view_host(),
-                                       frame_tree_node_->IsMainFrame());
-  }
+  render_frame_host_->UpdatePendingWebUI(dest_url, bindings);
 
   // The renderer can exit view source mode when any error or cancellation
   // happen. We must overwrite to recover the mode.
@@ -2424,6 +2316,7 @@ void RenderFrameHostManager::CancelPending() {
   TRACE_EVENT1("navigation", "RenderFrameHostManager::CancelPending",
                "FrameTreeNode id", frame_tree_node_->frame_tree_node_id());
   DiscardUnusedFrame(UnsetPendingRenderFrameHost());
+  render_frame_host_->DiscardPendingWebUI();
 }
 
 scoped_ptr<RenderFrameHostImpl>
@@ -2438,9 +2331,6 @@ RenderFrameHostManager::UnsetPendingRenderFrameHost() {
   // We no longer need to prevent the process from exiting.
   pending_render_frame_host->GetProcess()->RemovePendingView();
 
-  pending_web_ui_.reset();
-  pending_and_current_web_ui_.reset();
-
   return pending_render_frame_host.Pass();
 }
 
@@ -2615,8 +2505,7 @@ void RenderFrameHostManager::CreateOpenerProxiesForFrameTree(
         frame_tree->root()->render_manager()->CreateRenderFrameProxy(instance);
       } else {
         frame_tree->root()->render_manager()->CreateRenderFrame(
-            instance, nullptr, CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN,
-            nullptr);
+            instance, CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN, nullptr);
       }
     }
   }