DevTools: split protocol.json into files per domain.

third_party/WebKit/Source/devtools/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//third_party/WebKit/Source/core/core.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("devtools.gypi") ],
                           "scope",
                           [ "devtools.gypi" ])
 
 # Some of the files in the .gypi use GYP variable expansions, go through and
 # fix them.
 devtools_core_files =
     gypi_values.devtools_core_base_files +
@@ skipping 201 matching lines @@
   outputs = [
     resources_out_dir + "SupportedCSSProperties.js",
   ]
 
   args =
       rebase_path(inputs, root_build_dir) + rebase_path(outputs, root_build_dir)
 }
 
 action("frontend_protocol_sources") {
   script = "scripts/CodeGeneratorFrontend.py"
-
+  deps = [
+    "../core/inspector:protocol_version",
+  ]
   inputs = [
-    "protocol.json",
+    "$blink_core_output_dir/inspector/protocol.json",
   ]
   outputs = [
     resources_out_dir + "InspectorBackendCommands.js",
   ]
 
   args = rebase_path(inputs, root_build_dir) + [
            "--output_js_dir",
            rebase_path(resources_out_dir, root_build_dir),
          ]
 }
@@ skipping 102 matching lines @@
   }
 
   copy("copy_codemirror_files") {
     sources =
         gypi_values.devtools_cm_js_files + gypi_values.devtools_cm_css_files
     outputs = [
       resources_out_dir + "cm/{{source_file_part}}",
     ]
   }
 }