PlzNavigate: don't stop all loaders when renderer-initiated nav fails

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index ebda68aa738d402ad920e1bc0c4419b893699343..1b84844a79f59ad85b2efe8756dcfc2ec498a6a3 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -2164,6 +2164,11 @@ void WebLocalFrameImpl::mixedContentFound(
       hadRedirect, std::move(source));
 }
 
+void WebLocalFrameImpl::clientDroppedNavigation() {
+  if (frame())

[dcheng, 2017/03/22 19:00:50]

Nit: is it possible to DCHECK() this?

There are only two times this would be null:
- The frame is not completely initialized, but PlzNavigate should not be active
for that frame then.
- The frame is detached, but then IPCs shouldn't be routed to the RenderFrame.

+    frame()->loader().clientDroppedNavigation();
+}
+
 void WebLocalFrameImpl::sendOrientationChangeEvent() {
   if (!frame())
     return;