Android: Avoid linking with --gc-sections.

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 3472 matching lines @@
       "//components/gcm_driver/instance_id/android:instance_id_driver_java",
       "//components/gcm_driver/instance_id/android:instance_id_driver_test_support_java",
       "//components/offline_pages:test_support",
       "//v8:v8_external_startup_data_assets",
     ]
     deps -= [ "//third_party/libaddressinput" ]
 
     android_manifest =
         "//chrome/test/android/unit_tests_apk/AndroidManifest.xml"
     enable_multidex = true
-
-    # Some android targets still depend on --gc-sections to link.
-    # TODO: remove --gc-sections for Debug builds (crbug.com/159847).
-    ldflags = [ "-Wl,--gc-sections" ]
   } else {
     sources += [
       # Bookmark export/import are handled via the BookmarkColumns
       # ContentProvider.
       "../browser/bookmarks/bookmark_html_writer_unittest.cc",
       "../browser/browser_commands_unittest.cc",
       "../browser/diagnostics/diagnostics_controller_unittest.cc",
       "../browser/diagnostics/diagnostics_model_unittest.cc",
       "../browser/download/download_commands_unittest.cc",
       "../browser/download/download_shelf_unittest.cc",
@@ skipping 1510 matching lines @@
       "touch_hud",
       "ui",
     ]
 
     if (is_linux && !is_android) {
       deps += [ "//components/font_service:manifest" ]
       packaged_services += [ "font_service" ]
     }
   }
 }