[DevTools] Use inspector_protocol generator in content/browser/devtools.

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index af4cca18209cf165fabbab1edf3764d25ddd1fe8..61bc6999552b4f0dd0c13b0bfc0c0d5ffed47a15 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -53,6 +53,7 @@ source_set("browser") {
     "//content/browser/background_sync:background_sync_proto",
     "//content/browser/cache_storage:cache_storage_proto",
     "//content/browser/devtools:gen_devtools_protocol_handler",
+    "//content/browser/devtools:protocol_sources",
     "//content/browser/devtools:resources",
     "//content/browser/notifications:notification_proto",
     "//content/browser/service_worker:service_worker_proto",
@@ -153,6 +154,11 @@ source_set("browser") {
     # //content/browser/devtools:gen_devtools_protocol_handler.
     "$root_gen_dir/content/browser/devtools/protocol/devtools_protocol_dispatcher.cc",
     "$root_gen_dir/content/browser/devtools/protocol/devtools_protocol_dispatcher.h",
+    "$target_gen_dir/devtools/protocol/forward.h",
+    "$target_gen_dir/devtools/protocol/protocol.cc",
+    "$target_gen_dir/devtools/protocol/protocol.h",
+    "$target_gen_dir/devtools/protocol/tracing.cc",
+    "$target_gen_dir/devtools/protocol/tracing.h",
     "../common/service_manager/child_connection.cc",
     "../common/service_manager/child_connection.h",
     "../zygote/zygote_linux.cc",
@@ -454,6 +460,8 @@ source_set("browser") {
     "devtools/protocol/tethering_handler.h",
     "devtools/protocol/tracing_handler.cc",
     "devtools/protocol/tracing_handler.h",
+    "devtools/protocol_string.cc",
+    "devtools/protocol_string.h",
     "devtools/render_frame_devtools_agent_host.cc",
     "devtools/render_frame_devtools_agent_host.h",
     "devtools/service_worker_devtools_agent_host.cc",