Delete blimp/helium and remove references to it from dependent targets

blimp/BUILD.gn

 # Copyright 2015 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/chrome_build.gni")
 import("//testing/test.gni")
 
 # Convenience meta-target for all of Blimp's production & test code.
 group("blimp") {
   # In spite of the name, this really just means that non-test targets
@@ skipping 34 matching lines @@
       ":blimp_browsertests",
       "//blimp/test/fake_engine:fake_engine_app_tests",
     ]
   }
 }
 
 test("blimp_unittests") {
   deps = [
     "//blimp/client:unit_tests",
     "//blimp/common:unit_tests",
-    "//blimp/helium:unit_tests",
     "//blimp/net:unit_tests",
     "//blimp/test:run_all_unittests",
   ]
 
   if (is_linux) {
     deps += [ "//blimp/engine:unit_tests" ]
   }
 
   if (is_android) {
     enable_multidex = true
@@ skipping 138 matching lines @@
       "--output",
       rebase_path(_output_path, root_build_dir),
       "--target",
       rebase_path(_wrapped_script, root_build_dir),
       "--output-directory",
       rebase_path(root_out_dir, root_build_dir),
       "--flag-name=--output-linux-directory",
     ]
   }
 }