Reland: Web MIDI: use mojom::blink::PermissionService directly to ask permission

third_party/WebKit/public/web/WebFrameClient.h

Index: third_party/WebKit/public/web/WebFrameClient.h
diff --git a/third_party/WebKit/public/web/WebFrameClient.h b/third_party/WebKit/public/web/WebFrameClient.h
index 3c34e68ed93ce0067fb51806d53bbed9d02398a0..5e0a805a3001fb64601d5554870d8dd11e5ece50 100644
--- a/third_party/WebKit/public/web/WebFrameClient.h
+++ b/third_party/WebKit/public/web/WebFrameClient.h
@@ -89,7 +89,6 @@ class WebMediaPlayerEncryptedMediaClient;
 class WebMediaPlayerSource;
 class WebMediaSession;
 class WebMediaStream;
-class WebMIDIClient;
 class WebNotificationPermissionCallback;
 class WebPermissionClient;
 class WebServiceWorkerProvider;
@@ -593,10 +592,6 @@ public:
     virtual WebEncryptedMediaClient* encryptedMediaClient() { return 0; }
 
 
-    // Web MIDI -------------------------------------------------------------
-
-    virtual WebMIDIClient* webMIDIClient() { return 0; }
-
     // User agent ------------------------------------------------------
 
     // Asks the embedder if a specific user agent should be used. Non-empty