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

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 20a159af380b79c8a118d88c4fd31c9f2f599a1d..3fac576309de1b705f9d02517e8afa8bd3456187 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -26,6 +26,7 @@
 #include "content/public/browser/navigation_throttle.h"
 #include "content/public/browser/ssl_status.h"
 #include "content/public/common/request_context_type.h"
+#include "third_party/WebKit/public/platform/WebMixedContent.h"
 #include "url/gurl.h"
 
 struct FrameHostMsg_DidCommitProvisionalLoad_Params;
@@ -155,6 +156,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
     return request_context_type_;
   }
 
+  blink::WebMixedContent::ContextType mixed_content_context_type() const {
+    DCHECK_GE(state_, WILL_SEND_REQUEST);
+    return mixed_content_context_type_;
+  }
+
   // Get the unique id from the NavigationEntry associated with this
   // NavigationHandle. Note that a synchronous, renderer-initiated navigation
   // will not have a NavigationEntry associated with it, and this will return 0.
@@ -221,6 +227,7 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
       ui::PageTransition transition,
       bool is_external_protocol,
       RequestContextType request_context_type,
+      blink::WebMixedContent::ContextType mixed_content_context_type,
       const ThrottleChecksFinishedCallback& callback);
 
   // Called when the URLRequest will be redirected in the network stack.
@@ -398,6 +405,9 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // The fetch request context type.
   RequestContextType request_context_type_;
 
+  // The mixed content context type for potential mixed content checks.
+  blink::WebMixedContent::ContextType mixed_content_context_type_;
+
   // This callback will be run when all throttle checks have been performed.
   ThrottleChecksFinishedCallback complete_callback_;