[DevTools] Add missing animation module to GN build.

Source/devtools/BUILD.gn

Index: Source/devtools/BUILD.gn
diff --git a/Source/devtools/BUILD.gn b/Source/devtools/BUILD.gn
index 59102ab1287afb8ec5fe7409cb2e6c74d5a3077e..dabea35a9304f69cfe74ac85d739bd7042ef551f 100644
--- a/Source/devtools/BUILD.gn
+++ b/Source/devtools/BUILD.gn
@@ -34,6 +34,7 @@ devtools_extensions_js_files = gypi_values.devtools_extensions_js_files -
 devtools_modules_js_files =
   gypi_values.devtools_accessibility_js_files +
   gypi_values.devtools_audits_js_files +
+  gypi_values.devtools_animation_js_files +
   gypi_values.devtools_cm_modes_js_files +
   gypi_values.devtools_components_lazy_js_files +
   gypi_values.devtools_console_js_files +
@@ -143,6 +144,7 @@ action("generate_devtools_grd") {
       resources_out_dir + "toolbox.js",
       resources_out_dir + "accessibility_module.js",
       resources_out_dir + "audits_module.js",
+      resources_out_dir + "animation_module.js",
       resources_out_dir + "components_lazy_module.js",
       resources_out_dir + "console_module.js",
       resources_out_dir + "elements_module.js",
@@ -254,6 +256,7 @@ action("build_applications") {
       resources_out_dir + "toolbox.js",
       resources_out_dir + "accessibility_module.js",
       resources_out_dir + "audits_module.js",
+      resources_out_dir + "animation_module.js",
       resources_out_dir + "cm_modes_module.js",
       resources_out_dir + "components_lazy_module.js",
       resources_out_dir + "console_module.js",