PlzNavigate: Fixes ChromeOS navigation to google drive files.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index cd3a864d50d0e1a705539d3bfec517dfd39ce22b..4d85a84221eca1860d358587e71e2420e9a94ca9 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -3588,6 +3588,10 @@ void RenderFrameHostImpl::UpdatePermissionsForNavigation(
   // Browser plugin guests are not allowed to navigate outside web-safe schemes,
   // so do not grant them the ability to request additional URLs.
   if (!GetProcess()->IsForGuestsOnly()) {
+    for (const GURL& url : request_params.redirects) {
+      ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
+          GetProcess()->GetID(), url);

[nasko, 2017/05/23 04:39:34]

It seems a bit more prudent to grant access to the original_url. I'm not sure if
granting access to the full redirect chain is a reasonable thing. Let's start
with original_url, which should allow for the CromeOS issue to be resolved.

+    }
     ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
         GetProcess()->GetID(), common_params.url);
     if (common_params.url.SchemeIs(url::kDataScheme) &&