PlzNavigate: send SourceLocation when mixed content is found

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 3d62bb76c3ff21e89cdc417c465c26ad9e2fc27b..d61212229fba3da1a2671db8697030c8a7cfd188 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -355,6 +355,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
     base_url_for_data_url_ = url;
   }
 
+  const SourceLocation& source_location() const { return source_location_; }
+  void set_source_location(const SourceLocation& source_location) {
+    source_location_ = source_location;
+  }
+
  private:
   friend class NavigationHandleImplTest;
 
@@ -520,6 +525,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   net::HostPortPair socket_address_;
   NavigationType navigation_type_;
 
+  // PlzNavigate
+  // Information about the JavaScript that started the navigation. For
+  // navigations initiated by Javascript.
+  SourceLocation source_location_;
+
   base::WeakPtrFactory<NavigationHandleImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);