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

content/common/resource_request.h

Index: content/common/resource_request.h
diff --git a/content/common/resource_request.h b/content/common/resource_request.h
index 0f5651fadff17f0ce9650188809c70f0fa0950e0..a19d91279d75eff9234f50eab14fb2de9ab27b51 100644
--- a/content/common/resource_request.h
+++ b/content/common/resource_request.h
@@ -19,6 +19,7 @@
 #include "content/public/common/request_context_type.h"
 #include "content/public/common/resource_type.h"
 #include "net/base/request_priority.h"
+#include "third_party/WebKit/public/platform/WebMixedContentContextType.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "ui/base/page_transition_types.h"
@@ -116,6 +117,10 @@ struct CONTENT_EXPORT ResourceRequest {
   RequestContextType fetch_request_context_type =
       REQUEST_CONTEXT_TYPE_UNSPECIFIED;
 
+  // The mixed content context type to be used for mixed content checks.
+  blink::WebMixedContentContextType fetch_mixed_content_context_type =
+      blink::WebMixedContentContextType::Blockable;
+
   // The frame type passed to the ServiceWorker.
   RequestContextFrameType fetch_frame_type =
       REQUEST_CONTEXT_FRAME_TYPE_AUXILIARY;