indexeddb: Made two IndexedDBDispatcherHost methods private.

mojo_blob_storage_context() and native_file_system_context() are only
used by IndexedDBDispatcherHost. Making them private to simplify the
interface.

Bug: none
Change-Id: I7647d6c8301e7ccce9e60d0ea363202ed8e80d5e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575897Reviewed-by: Joshua Bell <jsbell@chromium.org>
Commit-Queue: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#834037}

content/browser/indexed_db/indexed_db_dispatcher_host.h

@@ -64,8 +64,6 @@ class CONTENT_EXPORT IndexedDBDispatcherHost : public blink::mojom::IDBFactory {
 
   // A shortcut for accessing our context.
   IndexedDBContextImpl* context() const { return indexed_db_context_; }
-  storage::mojom::BlobStorageContext* mojo_blob_storage_context();
-  storage::mojom::NativeFileSystemContext* native_file_system_context();
 
   // Must be called on the IDB sequence.
   base::WeakPtr<IndexedDBDispatcherHost> AsWeakPtr() {
@@ -97,6 +95,9 @@ class CONTENT_EXPORT IndexedDBDispatcherHost : public blink::mojom::IDBFactory {
  private:
   friend class IndexedDBDispatcherHostTest;
 
+  storage::mojom::BlobStorageContext* mojo_blob_storage_context();
+  storage::mojom::NativeFileSystemContext* native_file_system_context();
+
   // blink::mojom::IDBFactory implementation:
   void GetDatabaseInfo(mojo::PendingAssociatedRemote<blink::mojom::IDBCallbacks>
                            pending_callbacks) override;