Revert of Remove about:srcdoc url conversion.

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 d95ee27c19c877cca8c9515eb3e2002e9278a7cc..c02844b80f469e4fffd04f4dabee9f9eb87d0584 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -82,6 +82,7 @@
       FrameTreeNode* frame_tree_node,
       bool is_renderer_initiated,
       bool is_same_page,
+      bool is_srcdoc,
       const base::TimeTicks& navigation_start,
       int pending_nav_entry_id,
       bool started_from_context_menu);
@@ -93,6 +94,7 @@
   bool IsInMainFrame() override;
   bool IsParentMainFrame() override;
   bool IsRendererInitiated() override;
+  bool IsSrcdoc() override;
   bool WasServerRedirect() override;
   int GetFrameTreeNodeId() override;
   int GetParentFrameTreeNodeId() override;
@@ -304,6 +306,7 @@
                        FrameTreeNode* frame_tree_node,
                        bool is_renderer_initiated,
                        bool is_same_page,
+                       bool is_srcdoc,
                        const base::TimeTicks& navigation_start,
                        int pending_nav_entry_id,
                        bool started_from_context_menu);
@@ -346,6 +349,7 @@
   RenderFrameHostImpl* render_frame_host_;
   const bool is_renderer_initiated_;
   const bool is_same_page_;
+  const bool is_srcdoc_;
   bool was_redirected_;
   scoped_refptr<net::HttpResponseHeaders> response_headers_;
   net::HttpResponseInfo::ConnectionInfo connection_info_;