Generate java bindings for constants.

mojo/public/tools/bindings/mojom_bindings_generator.gypi

Index: mojo/public/tools/bindings/mojom_bindings_generator.gypi
diff --git a/mojo/public/tools/bindings/mojom_bindings_generator.gypi b/mojo/public/tools/bindings/mojom_bindings_generator.gypi
index e325a9017a885c6c12840ae65ca005d86fce9426..450d160a05979193421f3389dcbe76fc3aa290bb 100644
--- a/mojo/public/tools/bindings/mojom_bindings_generator.gypi
+++ b/mojo/public/tools/bindings/mojom_bindings_generator.gypi
@@ -14,6 +14,7 @@
         #      '<!(python <(DEPTH)/build/inverse_depth.py <(DEPTH))',
         'mojom_bindings_generator':
             '<(DEPTH)/mojo/public/tools/bindings/mojom_bindings_generator.py',
+        'java_out_dir': '<(PRODUCT_DIR)/java_mojo/<(_target_name)/src',
       },
       'inputs': [
         '<(mojom_bindings_generator)',
@@ -36,11 +37,16 @@
         '<(DEPTH)/mojo/public/tools/bindings/generators/cpp_templates/struct_destructor.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/cpp_templates/struct_macros.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_declaration.tmpl',
+        '<(DEPTH)/mojo/public/tools/bindings/generators/java_templates/constant_definition.tmpl',
+        '<(DEPTH)/mojo/public/tools/bindings/generators/java_templates/constants.java.tmpl',
+        '<(DEPTH)/mojo/public/tools/bindings/generators/java_templates/header.java.tmpl',
+        '<(DEPTH)/mojo/public/tools/bindings/generators/java_templates/java_macros.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/js_templates/enum_definition.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/js_templates/module.js.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/js_templates/struct_definition.tmpl',
         '<(DEPTH)/mojo/public/tools/bindings/generators/mojom_cpp_generator.py',
+        '<(DEPTH)/mojo/public/tools/bindings/generators/mojom_java_generator.py',
         '<(DEPTH)/mojo/public/tools/bindings/generators/mojom_js_generator.py',
         '<(DEPTH)/mojo/public/tools/bindings/pylib/mojom/__init__.py',
         '<(DEPTH)/mojo/public/tools/bindings/pylib/mojom/error.py',
@@ -68,6 +74,7 @@
         '--use_chromium_bundled_pylibs',
         '-d', '<(DEPTH)',
         '-o', '<(SHARED_INTERMEDIATE_DIR)/<(mojom_base_output_dir)/<(RULE_INPUT_DIRNAME)',
+        '--java_output_directory=<(java_out_dir)',
       ],
       'message': 'Generating Mojo bindings from <(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).mojom',
       'process_outputs_as_sources': 1,
@@ -82,6 +89,11 @@
       '<(DEPTH)',
       '<(SHARED_INTERMEDIATE_DIR)',
     ],
+    'variables': {
+      'generated_src_dirs': [
+        '<(PRODUCT_DIR)/java_mojo/<(_target_name)/src',
+      ],
+    },
   },
   'hard_dependency': 1,
 }