PlzNavigate: make ctrl+click works.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index f580526323d13b673d5d1ee4a7133846afc88609..328b4f31ac0a737028e6132804339283abf8f224 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -5133,8 +5133,13 @@ WebNavigationPolicy RenderFrameImpl::decidePolicyForNavigation(
   if (IsBrowserSideNavigationEnabled() &&
       info.urlRequest.checkForBrowserSideNavigation() &&
       ShouldMakeNetworkRequestForURL(url)) {
-    BeginNavigation(info);
-    return blink::WebNavigationPolicyHandledByClient;
+    if (info.defaultPolicy == blink::WebNavigationPolicyCurrentTab) {
+      BeginNavigation(info);
+      return blink::WebNavigationPolicyHandledByClient;
+    } else {
+      LoadURLExternally(info.urlRequest, info.defaultPolicy);
+      return blink::WebNavigationPolicyIgnore;
+    }
   }
 
   return info.defaultPolicy;