FrameLoader: Fix NavigationType for FrameLoadTypeReloadMainResource

When I introduced FrameLoadTypeReloadMainResource, this modification
was not applied mistakenly. The right NavigationType for the one
is NavigationTypeReload as is for other reload variants' FrameLoadType.

This results in propagating a wrong is_reload flag to some delegates,
e.g. blink::WebLocalFrameImpl::dispatchBeforeUnloadEvent().

BUG=612701

Review-Url: https://codereview.chromium.org/2124253002
Cr-Commit-Position: refs/heads/master@{#404126}
1 file changed