Pass BrowserContext to drive::MountPointProviderDelegate.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 29c8a282dbc381e69f04a81df6a8b490cc317765..c3f806005be7862fa648abb8ac98f47ed72bb88e 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -562,18 +562,16 @@ class CONTENT_EXPORT ContentBrowserClient {
       std::vector<std::string>* additional_schemes) {}
 
   // Returns additional MountPointProviders for FileSystem API.
-  // |special_storage_policy| and |external_mount_points| are needed in the
-  // additional MountPointProviders. |special_storage_policy| is used to grant
-  // permissions. |external_mount_points| has mount points to create objects
-  // returned by additional MountPointProviders. (Note: although it is named
-  // "provider", it acts creating objects based on mount points provided by
-  // |external_mount_points|).
+  // |browser_context| and |special_storage_policy| are needed in the
+  // additional MountPointProviders. |browser_context| has mount points to
+  // create objects returned by additional MountPointProviders.
+  // |special_storage_policy| is used to grant permissions.
   virtual void GetAdditionalFileSystemMountPointProviders(
+      BrowserContext* browser_context,
       const base::FilePath& storage_partition_path,
       quota::SpecialStoragePolicy* special_storage_policy,
-      fileapi::ExternalMountPoints* external_mount_points,
       ScopedVector<fileapi::FileSystemMountPointProvider>*
-          additional_providers) {}
+      additional_providers) {}
 
   // Allows an embedder to return its own LocationProvider implementation.
   // Return NULL to use the default one for the platform to be created.