[Fuchsia] Routes timeline events to Fuchsia's tracing app

runtime/bin/BUILD.gn

 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 import("gypi_contents.gni")
 import("../runtime_args.gni")
 import("../../build/compiled_action.gni")
 
 declare_args() {
   # Controls the kind of core snapshot linked into the standalone VM. Using a
@@ skipping 624 matching lines @@
              ":libdart_builtin",
              "$dart_zlib_path",
            ] + extra_deps
 
     defines = extra_defines
 
     if (dart_use_tcmalloc) {
       deps += [ "//third_party/tcmalloc" ]
     }
 
+    if (is_fuchsia) {
+      deps += [ "//apps/tracing/lib/trace" ]
+    }
+
     sources = [
                 "error_exit.cc",
                 "error_exit.h",
                 "main.cc",
                 "snapshot_utils.cc",
                 "snapshot_utils.h",
                 "vmservice_impl.cc",
                 "vmservice_impl.h",
               ] + extra_sources
 
@@ skipping 223 matching lines @@
     "..",
     "$target_gen_dir",
   ]
   defines = [ "TESTING" ]
 
   if (dart_use_tcmalloc) {
     deps += [ "//third_party/tcmalloc" ]
     defines += [ "DART_USE_TCMALLOC" ]
   }
 
+  if (is_fuchsia) {
+    deps += [ "//apps/tracing/lib/trace" ]
+  }
+
   # The VM sources are already included in libdart, so we just want to add in
   # the tests here.
   vm_tests = rebase_path(vm_tests_list, ".", "../vm")
 
   sources = [
               "error_exit.cc",
               "error_exit.h",
               "snapshot_utils.cc",
               "snapshot_utils.h",
               "builtin_nolib.cc",
@@ skipping 55 matching lines @@
   ]
   if (is_linux || is_android) {
     cflags = [ "-fPIC" ]
   }
   if (is_win) {
     libs = [ "dart.lib" ]
     abs_root_out_dir = rebase_path(root_out_dir)
     ldflags = [ "/LIBPATH:$abs_root_out_dir" ]
   }
 }