Mojo C++ bindings: switch the generated code of clipboard.mojom to use STL types.

services/ui/clipboard/clipboard_impl.h

Index: services/ui/clipboard/clipboard_impl.h
diff --git a/services/ui/clipboard/clipboard_impl.h b/services/ui/clipboard/clipboard_impl.h
index 423c3fdcb79cc4dbb757329584c9e6c0b330a1be..e651189fefb1e9759cea96daeccdc2b9ba85f7ee 100644
--- a/services/ui/clipboard/clipboard_impl.h
+++ b/services/ui/clipboard/clipboard_impl.h
@@ -41,11 +41,12 @@ class ClipboardImpl : public mojom::Clipboard {
       mojom::Clipboard::Type clipboard_types,
       const GetAvailableMimeTypesCallback& callback) override;
   void ReadClipboardData(mojom::Clipboard::Type clipboard_type,
-                         const mojo::String& mime_type,
+                         const std::string& mime_type,
                          const ReadClipboardDataCallback& callback) override;
   void WriteClipboardData(
       mojom::Clipboard::Type clipboard_type,
-      mojo::Map<mojo::String, mojo::Array<uint8_t>> data,
+      const base::Optional<
+          std::unordered_map<std::string, std::vector<uint8_t>>>& data,
       const WriteClipboardDataCallback& callback) override;
 
  private: