Add is_srcdoc to FrameNavigationEntry and restore about::srcdoc URL.

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index 8feb8e20b4703844c6e6de8b98378b9c01a30f04..42f2abd2be80a2374219d27b78746ff89fe9f0d8 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -218,6 +218,7 @@ NavigationRequest::NavigationRequest(
       begin_params_(begin_params),
       request_params_(request_params),
       browser_initiated_(browser_initiated),
+      is_srcdoc_(false),
       state_(NOT_STARTED),
       restore_type_(RestoreType::NONE),
       is_view_source_(false),
@@ -229,6 +230,7 @@ NavigationRequest::NavigationRequest(
     if (frame_entry) {
       source_site_instance_ = frame_entry->source_site_instance();
       dest_site_instance_ = frame_entry->site_instance();
+      is_srcdoc_ = frame_entry->is_srcdoc();
     }
 
     restore_type_ = entry->restore_type();
@@ -285,6 +287,13 @@ void NavigationRequest::BeginNavigation() {
   // it immediately.
   state_ = RESPONSE_STARTED;
 
+  // Iframes with the srcdoc attribute have the "about:srcdoc" URL inside the
+  // renderer and the "about:blank" URL inside the browser. The conversion is
+  // made in RenderFrameHostImpl::OnDidCommitProvisionalLoad. The initial url
+  // must be restored here when the navigation is committed into the renderer.
+  if (is_srcdoc_)
+    common_params_.url = GURL(content::kAboutSrcDocURL);
+
   // Select an appropriate RenderFrameHost.
   RenderFrameHostImpl* render_frame_host =
       frame_tree_node_->render_manager()->GetFrameHostForNavigation(*this);
@@ -299,11 +308,11 @@ void NavigationRequest::BeginNavigation() {
 
 void NavigationRequest::CreateNavigationHandle(int pending_nav_entry_id) {
   // TODO(nasko): Update the NavigationHandle creation to ensure that the
-  // proper values are specified for is_same_page and is_srcdoc.
+  // proper values is specified for is_same_page.
   navigation_handle_ = NavigationHandleImpl::Create(
       common_params_.url, frame_tree_node_, !browser_initiated_,
-      false,  // is_same_page
-      false,  // is_srcdoc
+      false,      // is_same_page
+      is_srcdoc_, // is_srcdoc
       common_params_.navigation_start, pending_nav_entry_id,
       false);  // started_in_context_menu
 }