Dismiss EME infobar when WebMediaPlayer is destroyed.

chrome/browser/content_settings/permission_request_id.h

Index: chrome/browser/content_settings/permission_request_id.h
diff --git a/chrome/browser/content_settings/permission_request_id.h b/chrome/browser/content_settings/permission_request_id.h
index 14bc2742ef36c6f38a8afafe13e62010cab02ec8..13d92e3ca1f976049f392c7ce4272a22d03f9b4e 100644
--- a/chrome/browser/content_settings/permission_request_id.h
+++ b/chrome/browser/content_settings/permission_request_id.h
@@ -10,12 +10,16 @@
 // Uniquely identifies a particular permission request.
 class PermissionRequestID {
  public:
-  PermissionRequestID(int render_process_id, int render_view_id, int bridge_id);
+  PermissionRequestID(int render_process_id,
+                      int render_view_id,
+                      int bridge_id,
+                      int group_id);
   ~PermissionRequestID();
 
   int render_process_id() const { return render_process_id_; }
   int render_view_id() const { return render_view_id_; }
   int bridge_id() const { return bridge_id_; }
+  int group_id() const { return group_id_; }
 
   bool Equals(const PermissionRequestID& other) const;
   bool IsForSameTabAs(const PermissionRequestID& other) const;
@@ -24,7 +28,15 @@ class PermissionRequestID {
  private:
   int render_process_id_;
   int render_view_id_;
+  // Id unique to this instance.
   int bridge_id_;
+  // Id possibly shared by multiple instance. This is used in
+  // PermissionQueueController::CancelInfoBarRequests(int group_id) to cancel
+  // multiple permission requests by a group id.
+  // For example, ProtectedMediaIdentifierPermissionContext class uses this.
+  // If you don't use that function, this doesn't matter and setting this to 0
+  // is recommended.
+  int group_id_;
 
   // Purposefully do not disable copying, as this is stored in STL containers.
 };