[Fuchsia] Build only the parts of the SDK that are needed

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index a0094562e537060c76ad2467586c794a30319d72..f37232f4b799773700f71f6d7c5a259b572a0f6d 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -67,80 +67,10 @@ group("runtime_precompiled") {
   ]
 }
 
-action("create_sdk") {
+group("create_sdk") {
   deps = [
-    "runtime/bin:dart",
-    "utils/analysis_server",
-    "utils/compiler:dart2js",
-    "utils/compiler:utils_wrapper",
-    "utils/dartanalyzer:generate_dartanalyzer_snapshot",
-    "utils/dartanalyzer:generate_summary_spec",
-    "utils/dartanalyzer:generate_summary_strong",
-    "utils/dartdevc",
-    "utils/dartdoc",
-    "utils/dartfmt",
-    "utils/pub",
-  ]
-
-  sdk_lib_files = exec_script("tools/list_dart_files.py",
-                              [
-                                "absolute",
-                                rebase_path("sdk/lib"),
-                              ],
-                              "list lines")
-
-  preamble_files =
-      exec_script("tools/list_files.py",
-                  [
-                    "absolute",
-                    "",
-                    rebase_path("sdk/lib/_internal/js_runtime/lib/preambles"),
-                  ],
-                  "list lines")
-
-  sdk_bin_files = exec_script("tools/list_files.py",
-                              [
-                                "absolute",
-                                "",
-                                rebase_path("sdk/bin"),
-                              ],
-                              "list lines")
-
-  inputs = sdk_lib_files + preamble_files + sdk_bin_files + [
-             "sdk/lib/dart_client.platform",
-             "sdk/lib/dart_server.platform",
-             "sdk/lib/dart_shared.platform",
-             "$root_gen_dir/dart2js.dart.snapshot",
-             "$root_gen_dir/utils_wrapper.dart.snapshot",
-             "$root_gen_dir/pub.dart.snapshot",
-             "$root_gen_dir/dartanalyzer.dart.snapshot",
-             "$root_gen_dir/dartdevc.dart.snapshot",
-             "$root_gen_dir/dartfmt.dart.snapshot",
-             "$root_gen_dir/analysis_server.dart.snapshot",
-             "$root_gen_dir/dartdoc.dart.snapshot",
-             "$root_gen_dir/spec.sum",
-             "$root_gen_dir/strong.sum",
-             "tools/VERSION",
-           ]
-
-  outputs = [
-    "$root_out_dir/dart-sdk/README",
-  ]
-
-  script = "tools/create_sdk.py"
-  args = [
-    "--sdk_output_dir",
-    rebase_path("$root_out_dir/dart-sdk"),
-    "--snapshot_location",
-    rebase_path("$root_gen_dir"),
+    "sdk:create_sdk",
   ]
-  if (defined(is_fuchsia) && is_fuchsia_host) {
-    args += [ "--copy_libs" ]
-  }
-  if (defined(is_fuchsia) && (is_fuchsia || is_fuchsia_host)) {
-    # The binaries are already stripped.
-    args += [ "--disable_stripping" ]
-  }
 }
 
 group("dart2js") {