Avoid using ContentBrowserClient::IsIllegalOrigin in ResourceDispatcherHost.

extensions/browser/guest_view/web_view/web_view_guest.h

Index: extensions/browser/guest_view/web_view/web_view_guest.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.h b/extensions/browser/guest_view/web_view/web_view_guest.h
index f7d686913588e38a24801ab5de415c0b1e4454ae..eb32c5baf3fd375148111ce6bd7601cf9184fdfb 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest.h
@@ -20,6 +20,7 @@
 #include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
 #include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_permission_types.h"
+#include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
 #include "extensions/browser/script_executor.h"
 
 namespace blink {
@@ -28,6 +29,7 @@ struct WebFindOptions;
 
 namespace content {
 struct GlobalRequestID;
+class ResourceContext;
 }  // namespace content
 
 namespace extensions {
@@ -321,6 +323,20 @@ class WebViewGuest : public guest_view::GuestView<WebViewGuest>,
 
   void ApplyAttributes(const base::DictionaryValue& params);
 
+  // Helper functions to add and remove guest processes. Invoked on the IO
+  // thread.
+  static void AddGuestHelper(
+      WebViewRendererState* renderer_state,
+      int guest_process_id,
+      int guest_routing_id,
+      const WebViewRendererState::WebViewInfo& web_view_info,
+      const content::ResourceContext* context);
+
+  static void RemoveGuestHelper(WebViewRendererState* renderer_state,
+                                int guest_process_id,
+                                int guest_routing_id,
+                                const content::ResourceContext* context);
+
   // Identifies the set of rules registries belonging to this guest.
   int rules_registry_id_;