Allow showing pending URL for new tab navigations, but only if safe.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 730 matching lines @@
 const NavigationControllerImpl& WebContentsImpl::GetController() const {
   return controller_;
 }
 
 BrowserContext* WebContentsImpl::GetBrowserContext() const {
   return controller_.GetBrowserContext();
 }
 
 const GURL& WebContentsImpl::GetURL() const {
   // We may not have a navigation entry yet
-  NavigationEntry* entry = controller_.GetActiveEntry();
+  NavigationEntry* entry = controller_.GetVisibleEntry();
   return entry ? entry->GetVirtualURL() : GURL::EmptyGURL();
 }
 
 WebContentsDelegate* WebContentsImpl::GetDelegate() {
   return delegate_;
 }
 
 void WebContentsImpl::SetDelegate(WebContentsDelegate* delegate) {
   // TODO(cbentzel): remove this debugging code?
   if (delegate == delegate_)
@@ skipping 125 matching lines @@
   std::string accept_languages =
       GetContentClient()->browser()->GetAcceptLangs(
           GetBrowserContext());
   if (entry) {
     return entry->GetTitleForDisplay(accept_languages);
   }
   WebUI* our_web_ui = render_manager_.pending_web_ui() ?
       render_manager_.pending_web_ui() : render_manager_.web_ui();
   if (our_web_ui) {
     // Don't override the title in view source mode.
-    entry = controller_.GetActiveEntry();
+    entry = controller_.GetVisibleEntry();
     if (!(entry && entry->IsViewSourceMode())) {
       // Give the Web UI the chance to override our title.
       const string16& title = our_web_ui->GetOverriddenTitle();
       if (!title.empty())
         return title;
     }
   }
 
   // We use the title for the last committed entry rather than a pending
   // navigation entry. For example, when the user types in a URL, we want to
   // keep the old page's title until the new load has committed and we get a new
   // title.
   entry = controller_.GetLastCommittedEntry();
+
+  // We make an exception for initial navigations, because we can have a
+  // committed entry for an initial navigation when doing a history navigation
+  // in a new tab, such as Ctrl+Back.
+  if (entry && controller_.IsInitialNavigation())
+    entry = controller_.GetVisibleEntry();
+
   if (entry) {
     return entry->GetTitleForDisplay(accept_languages);
   }
 
   // |page_title_when_no_navigation_entry_| is finally used
   // if no title cannot be retrieved.
   return page_title_when_no_navigation_entry_;
 }
 
 int32 WebContentsImpl::GetMaxPageID() {
@@ skipping 1145 matching lines @@
   bool is_error_page = (url.spec() == kUnreachableWebDataURL);
   bool is_iframe_srcdoc = (url.spec() == chrome::kAboutSrcDocURL);
   GURL validated_url(url);
   RenderProcessHost* render_process_host =
       render_view_host->GetProcess();
   RenderViewHost::FilterURL(render_process_host, false, &validated_url);
 
   if (is_main_frame)
     DidChangeLoadProgress(0);
 
+  // Create a pending entry for this provisional load (if none exists) using the
+  // current SiteInstance, and ensure the address bar updates accordingly.
+  // We don't know the referrer or extra headers at this point, but the referrer
+  // will be set properly upon commit.
+  if (is_main_frame && !controller_.GetPendingEntry()) {
+    NavigationEntryImpl* entry = NavigationEntryImpl::FromNavigationEntry(
+        controller_.CreateNavigationEntry(validated_url,
+                                          content::Referrer(),
+                                          content::PAGE_TRANSITION_LINK,
+                                          true /* is_renderer_initiated */,
+                                          std::string(), GetBrowserContext()));
+    entry->set_site_instance(
+        static_cast<SiteInstanceImpl*>(GetSiteInstance()));
+    controller_.SetPendingEntry(entry);
+    NotifyNavigationStateChanged(content::INVALIDATE_TYPE_URL);
+  }
+
   // Notify observers about the start of the provisional load.
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DidStartProvisionalLoadForFrame(frame_id, parent_frame_id,
                     is_main_frame, validated_url, is_error_page,
                     is_iframe_srcdoc, render_view_host));
 
   if (is_main_frame) {
     // Notify observers about the provisional change in the main frame URL.
     FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                       ProvisionalChangeToMainFrameUrl(validated_url,
@@ skipping 914 matching lines @@
   // Notify all swapped out RenderViewHosts for this tab.  This is important
   // in case we go back to them, or if another window in those processes tries
   // to access window.opener.
   render_manager_.DidDisownOpener(rvh);
 }
 
 void WebContentsImpl::DidUpdateFrameTree(RenderViewHost* rvh) {
   render_manager_.DidUpdateFrameTree(rvh);
 }
 
+void WebContentsImpl::DidAccessInitialDocument() {
+  // Update the URL display.
+  NotifyNavigationStateChanged(content::INVALIDATE_TYPE_URL);
+}
+
 void WebContentsImpl::DocumentAvailableInMainFrame(
     RenderViewHost* render_view_host) {
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     DocumentAvailableInMainFrame());
 }
 
 void WebContentsImpl::DocumentOnLoadCompletedInMainFrame(
     RenderViewHost* render_view_host,
     int32 page_id) {
   NotificationService::current()->Notify(
@@ skipping 490 matching lines @@
 }
 
 BrowserPluginGuestManager*
     WebContentsImpl::GetBrowserPluginGuestManager() const {
   return static_cast<BrowserPluginGuestManager*>(
       GetBrowserContext()->GetUserData(
           browser_plugin::kBrowserPluginGuestManagerKeyName));
 }
 
 }  // namespace content