Update mojo sdk to rev f84766d3b6420b7cf6a113d9d65d73cb5fe18d90

third_party/mojo/mojom_bindings_generator_explicit.gypi

Index: third_party/mojo/mojom_bindings_generator_explicit.gypi
diff --git a/third_party/mojo/mojom_bindings_generator_explicit.gypi b/third_party/mojo/mojom_bindings_generator_explicit.gypi
index 3d2d80b6f348beae428a4d39d0bd3509a99b758e..57534fd7aad800595486c809e38f8a2bb7b619e0 100644
--- a/third_party/mojo/mojom_bindings_generator_explicit.gypi
+++ b/third_party/mojo/mojom_bindings_generator_explicit.gypi
@@ -12,6 +12,7 @@
     'mojom_generated_outputs': [
       '<!@(python <(DEPTH)/third_party/mojo/src/mojo/public/tools/bindings/mojom_list_outputs.py --basedir <(mojom_base_output_dir) <@(mojom_files))',
     ],
+    'require_interface_bindings%': 1,
   },
   # Given mojom files as inputs, generate sources.  These sources will be
   # exported to another target (via dependent_settings) to be compiled.  This
@@ -65,6 +66,13 @@
       'message': 'Generating Mojo bindings from <@(mojom_files)',
     }
   ],
+  'conditions': [
+    ['require_interface_bindings==1', {
+      'dependencies': [
+        '<(DEPTH)/third_party/mojo/mojo_public.gyp:mojo_interface_bindings',
+      ],
+    }],
+  ],
   # Prevent the generated sources from being injected into the "all" target by
   # preventing the code generator from being directly depended on by the "all"
   # target.