Allow view-source of pages fully-blocked by Blink's XSS filter.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 6d1c597d7604629df1b636ed8947c099fbc40c5c..cda5a721bab4baf1259ddf39a64a7b791d19b794 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -769,12 +769,14 @@ bool NavigationControllerImpl::RendererDidNavigate(
   details->is_in_page = IsURLInPageNavigation(
       params.url, params.was_within_same_page, details->type);
 
+  bool clear_blocked_page_entry = true;
   switch (details->type) {
     case NAVIGATION_TYPE_NEW_PAGE:
       RendererDidNavigateToNewPage(rfh, params, details->did_replace_entry);
       break;
     case NAVIGATION_TYPE_EXISTING_PAGE:
       RendererDidNavigateToExistingPage(rfh, params);
+      clear_blocked_page_entry = false;
       break;
     case NAVIGATION_TYPE_SAME_PAGE:
       RendererDidNavigateToSamePage(rfh, params);
@@ -803,6 +805,9 @@ bool NavigationControllerImpl::RendererDidNavigate(
       NOTREACHED();
   }
 
+  if (clear_blocked_page_entry)
+    blocked_page_entry_.reset(NULL);
+
   // At this point, we know that the navigation has just completed, so
   // record the time.
   //
@@ -1755,6 +1760,15 @@ void NavigationControllerImpl::SetTransientEntry(NavigationEntry* entry) {
   delegate_->NotifyNavigationStateChanged(kInvalidateAll);
 }
 
+NavigationEntry* NavigationControllerImpl::GetBlockedPageEntry() const {
+  return blocked_page_entry_.get();
+}
+
+void NavigationControllerImpl::SetBlockedPageEntry(NavigationEntry* entry) {
+  NavigationEntry* copy = NavigationEntry::Create(*entry);
+  blocked_page_entry_.reset(static_cast<NavigationEntryImpl*>(copy));
+}
+
 void NavigationControllerImpl::InsertEntriesFrom(
     const NavigationControllerImpl& source,
     int max_index) {