[DevTools] Move emulated devices to separate module.

Source/devtools/BUILD.gn

Index: Source/devtools/BUILD.gn
diff --git a/Source/devtools/BUILD.gn b/Source/devtools/BUILD.gn
index 5a96594a3070a2d0d5045be53d9c9fcace2f8386..3099a713b74ae4d608d8fadfe6cff6743b12dada 100644
--- a/Source/devtools/BUILD.gn
+++ b/Source/devtools/BUILD.gn
@@ -38,6 +38,7 @@ devtools_modules_js_files =
   gypi_values.devtools_components_lazy_js_files +
   gypi_values.devtools_console_js_files +
   gypi_values.devtools_elements_js_files +
+  gypi_values.devtools_emulated_devices_js_files +
   devtools_extensions_js_files +
   gypi_values.devtools_heap_snapshot_worker_js_files +
   gypi_values.devtools_layers_js_files +
@@ -140,6 +141,7 @@ action("generate_devtools_grd") {
       resources_out_dir + "components_lazy_module.js",
       resources_out_dir + "console_module.js",
       resources_out_dir + "elements_module.js",
+      resources_out_dir + "emulated_devices_module.js",
       resources_out_dir + "heap_snapshot_worker_module.js",
       resources_out_dir + "layers_module.js",
       resources_out_dir + "network_module.js",
@@ -247,6 +249,7 @@ action("build_applications") {
       resources_out_dir + "components_lazy_module.js",
       resources_out_dir + "console_module.js",
       resources_out_dir + "elements_module.js",
+      resources_out_dir + "emulated_devices_module.js",
       resources_out_dir + "heap_snapshot_worker_module.js",
       resources_out_dir + "layers_module.js",
       resources_out_dir + "network_module.js",