[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 0248825a887d7457aff6fdd0a6bfc1b3ec6cfb70..9b014bd43e327d02b14a2611e43063709cd211ef 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -54,6 +54,7 @@ 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",
@@ -155,6 +156,13 @@ 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/io.cc",
+    "$target_gen_dir/devtools/protocol/io.h",
+    "$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",
@@ -456,6 +464,8 @@ 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",