Convert app banners to use Mojo.

third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h

Index: third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h
diff --git a/third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h b/third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h
index dc38d0a89acf6f1c94c20c1c1ab71ca1ae2d0ef0..021164b49935c7d81e56939e3ef06e022b5d8755 100644
--- a/third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h
+++ b/third_party/WebKit/Source/modules/app_banner/AppBannerPromptResult.h
@@ -12,8 +12,6 @@
 
 namespace blink {
 
-class ScriptPromiseResolver;
-
 class AppBannerPromptResult final
     : public GarbageCollectedFinalized<AppBannerPromptResult>,
       public ScriptWrappable {
@@ -22,7 +20,7 @@ class AppBannerPromptResult final
 
  public:
   static AppBannerPromptResult* create(
-      const AtomicString& platform,
+      const String& platform,
       WebAppBannerPromptResult::Outcome outcome) {
     return new AppBannerPromptResult(platform, outcome);
   }
@@ -35,7 +33,7 @@ class AppBannerPromptResult final
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
  private:
-  AppBannerPromptResult(const AtomicString& platform,
+  AppBannerPromptResult(const String& platform,
                         WebAppBannerPromptResult::Outcome);
 
   String m_platform;