Split bundle generation steps so that API registration is generated in browser, not common.

chrome/common/extensions/api/schemas.gni

+# 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")
+
+gypi_values = exec_script(
+    "//build/gypi_to_gn.py",
+    [ rebase_path("schemas.gypi") ],
+    "scope",
+    [ "schemas.gypi" ])
+
+# Common sources that are both bundled and compiled.
+if (is_android) {
+  # Should be eliminated. See crbug.com/305852.
+  sources = gypi_values.android_schema_files
+} else {
+  sources = gypi_values.main_schema_files
+  if (is_chromeos) {
+    sources += gypi_values.chromeos_schema_files
+    if (is_chrome_branded) {
+      sources += gypi_values.chromeos_branded_schema_files
+    }
+  }
+  if (enable_webrtc) {
+    sources += gypi_values.webrtc_schema_files
+  }
+}
+
+if (!is_android) {
+  uncompiled_sources = gypi_values.main_non_compiled_schema_files
+}
+
+# impl_dir = "//chrome/browser/extensions/api"
+root_namespace = "extensions::api::%(namespace)s"
+
+deps = [
+  # Different APIs include some headers from chrome/common that in turn
+  # include generated headers from these targets.
+  # TODO(brettw) this should be made unnecessary if possible.
+  "//components/copresence/proto",
+  "//components/metrics/proto",
+  "//content/public/browser",
+  "//skia",
+  "//sync",
+]
+if (is_chromeos) {
+  # deps += [ "<(DEPTH)/chrome/chrome.gyp:drive_proto" ]  TODO)GYP)

[scottmg, 2014/08/25 17:09:01]

(GYP)

+}