Cut VrShell dependency on WebUi.

chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h

Index: chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h
diff --git a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h
index b7aebb1bb51115d8d1da4d1b4513f25f16128a7c..bbb690d002ed5bd0a073eb6972b4c357d8b80570 100644
--- a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h
+++ b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/android/vr_shell/ui_interface.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace base {
@@ -17,12 +18,13 @@ namespace vr_shell {
 class VrShell;
 }
 
-class VrShellUIMessageHandler : public content::WebUIMessageHandler {
+class VrShellUIMessageHandler : public content::WebUIMessageHandler,
+                                public vr_shell::UiCommandHandler {
  public:
   VrShellUIMessageHandler();
   ~VrShellUIMessageHandler() override;
 
-  void SendCommandToUi(const base::Value& value);
+  void SendCommandToUi(const base::Value& value) override;
 
  private:
   // content::WebUIMessageHandler: