Web MIDI: add RequestMIDISysExPermission to BrowserContext

content/shell/shell_browser_context.h

Index: content/shell/shell_browser_context.h
diff --git a/content/shell/shell_browser_context.h b/content/shell/shell_browser_context.h
index 800a9604f18dd78b1d362c51e3957cb8b4c7af8d..5176b0b6052b1668f69100175ea3b0d2cf8b3a3d 100644
--- a/content/shell/shell_browser_context.h
+++ b/content/shell/shell_browser_context.h
@@ -43,6 +43,11 @@ class ShellBrowserContext : public BrowserContext {
       GetMediaRequestContextForStoragePartition(
           const base::FilePath& partition_path,
           bool in_memory) OVERRIDE;
+  virtual void RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) OVERRIDE;
   virtual ResourceContext* GetResourceContext() OVERRIDE;
   virtual GeolocationPermissionContext*
       GetGeolocationPermissionContext() OVERRIDE;