PlzNavigate: Move navigation-level mixed content checks to the browser.

content/browser/loader/navigation_resource_throttle.h

Index: content/browser/loader/navigation_resource_throttle.h
diff --git a/content/browser/loader/navigation_resource_throttle.h b/content/browser/loader/navigation_resource_throttle.h
index a9685e347c700988dae5236040be4e5ade03b319..b2c304bf37d25fe80f999df7027411ba2c6385f3 100644
--- a/content/browser/loader/navigation_resource_throttle.h
+++ b/content/browser/loader/navigation_resource_throttle.h
@@ -12,6 +12,10 @@
 #include "content/public/browser/resource_throttle.h"
 #include "content/public/common/request_context_type.h"
 
+namespace blink {
+enum class WebMixedContentContextType;
+}
+
 namespace net {
 class URLRequest;
 }
@@ -27,7 +31,8 @@ class NavigationResourceThrottle : public ResourceThrottle {
   NavigationResourceThrottle(
       net::URLRequest* request,
       ResourceDispatcherHostDelegate* resource_dispatcher_host_delegate,
-      RequestContextType request_context_type);
+      RequestContextType request_context_type,
+      blink::WebMixedContentContextType mixed_content_context_type);
   ~NavigationResourceThrottle() override;
 
   // ResourceThrottle overrides:
@@ -56,6 +61,7 @@ class NavigationResourceThrottle : public ResourceThrottle {
   net::URLRequest* request_;
   ResourceDispatcherHostDelegate* resource_dispatcher_host_delegate_;
   RequestContextType request_context_type_;
+  blink::WebMixedContentContextType mixed_content_context_type_;
   bool in_cross_site_transition_;
   NavigationThrottle::ThrottleCheckResult on_transfer_done_result_;