Web MIDI: add RequestMIDISysExPermission to BrowserContext

chrome/test/base/testing_profile.h

Index: chrome/test/base/testing_profile.h
diff --git a/chrome/test/base/testing_profile.h b/chrome/test/base/testing_profile.h
index c8c7faa9ae072f31be109df0e7f8719c874421e5..a02d5c991e276c1bc0dfe77ce3e433333cdcd550 100644
--- a/chrome/test/base/testing_profile.h
+++ b/chrome/test/base/testing_profile.h
@@ -231,6 +231,12 @@ class TestingProfile : public Profile {
       GetMediaRequestContextForStoragePartition(
           const base::FilePath& partition_path,
           bool in_memory) OVERRIDE;
+  virtual void RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      int client_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) OVERRIDE;
   virtual net::URLRequestContextGetter* CreateRequestContextForStoragePartition(
       const base::FilePath& partition_path,
       bool in_memory,