Implement NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE.

content/browser/frame_host/navigation_handle_impl.cc

Index: content/browser/frame_host/navigation_handle_impl.cc
diff --git a/content/browser/frame_host/navigation_handle_impl.cc b/content/browser/frame_host/navigation_handle_impl.cc
index 30536bd306c76c4da490f9ea142210612c907d0c..1962a22ff92634284815cf791ae5bc70cdbb258b 100644
--- a/content/browser/frame_host/navigation_handle_impl.cc
+++ b/content/browser/frame_host/navigation_handle_impl.cc
@@ -287,7 +287,14 @@ void NavigationHandleImpl::CancelDeferredNavigation(
          state_ == DEFERRING_REDIRECT ||
          state_ == DEFERRING_RESPONSE);
   DCHECK(result == NavigationThrottle::CANCEL_AND_IGNORE ||
-         result == NavigationThrottle::CANCEL);
+         result == NavigationThrottle::CANCEL ||
+         result == NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE);
+  DCHECK(state_ != DEFERRING_RESPONSE ||
+         result != NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE);
+
+  if (result == NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE)
+    frame_tree_node_->SetFrameOwnerCollapsedState(true);
+
   state_ = CANCELING;
   RunCompleteCallback(result);
 }
@@ -560,6 +567,13 @@ void NavigationHandleImpl::DidCommitNavigation(
     state_ = DID_COMMIT_ERROR_PAGE;
   } else {
     state_ = DID_COMMIT;
+
+    // Getting this far means that the navigation was not blocked, and neither
+    // is this the error page navigation following a blocked navigation. Ensure
+    // the frame owner element is no longer collapsed as a result of a prior
+    // navigation having been blocked with BLOCK_REQUEST_AND_COLLAPSE.
+    if (!frame_tree_node()->IsMainFrame())
+      frame_tree_node()->SetFrameOwnerCollapsedState(false);
   }
 }
 
@@ -592,6 +606,11 @@ NavigationHandleImpl::CheckWillStartRequest() {
         state_ = CANCELING;
         return result;
 
+      case NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE:
+        frame_tree_node_->SetFrameOwnerCollapsedState(true);
+        state_ = CANCELING;
+        return result;
+
       case NavigationThrottle::DEFER:
         state_ = DEFERRING_START;
         next_index_ = i + 1;
@@ -623,6 +642,11 @@ NavigationHandleImpl::CheckWillRedirectRequest() {
         state_ = CANCELING;
         return result;
 
+      case NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE:
+        frame_tree_node_->SetFrameOwnerCollapsedState(true);
+        state_ = CANCELING;
+        return result;
+
       case NavigationThrottle::DEFER:
         state_ = DEFERRING_REDIRECT;
         next_index_ = i + 1;
@@ -667,6 +691,7 @@ NavigationHandleImpl::CheckWillProcessResponse() {
         return result;
 
       case NavigationThrottle::BLOCK_REQUEST:
+      case NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE:
         NOTREACHED();
     }
   }