Switch to the new go generator in the mojo tree.

mojo/public/tools/bindings/mojom.gni

Index: mojo/public/tools/bindings/mojom.gni
diff --git a/mojo/public/tools/bindings/mojom.gni b/mojo/public/tools/bindings/mojom.gni
index 6a59ff1e1d3b63ad16bdbb6c32d3ce78b5e02419..21c6ddef9ead41b82502f8666c82fd3b9b9e4700 100644
--- a/mojo/public/tools/bindings/mojom.gni
+++ b/mojo/public/tools/bindings/mojom.gni
@@ -129,6 +129,8 @@ template("mojom") {
       "$generator_root/mojom_tool/bin/mac64/mojom.sha1",
       "$generator_root/mojom_tool/bin/linux64/generators/c.sha1",
       "$generator_root/mojom_tool/bin/mac64/generators/c.sha1",
+      "$generator_root/mojom_tool/bin/linux64/generators/go.sha1",
+      "$generator_root/mojom_tool/bin/mac64/generators/go.sha1",
       "$generator_root/pylib/mojom/__init__.py",
       "$generator_root/pylib/mojom/error.py",
       "$generator_root/pylib/mojom/generate/__init__.py",
@@ -210,7 +212,7 @@ template("mojom") {
         rebase_path(root_gen_dir),
         "--no-gen-imports",
         "--generators",
-        "legacy,c",
+        "legacy,c,go",
       ]
 
       if (defined(invoker.generate_type_info) && invoker.generate_type_info) {