Revert of 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/chrome_tests.gni")
@@ skipping 1656 matching lines @@
       "//components/autofill/content/renderer:test_support",
       "//components/data_reduction_proxy/core/browser:test_support",
       "//components/data_use_measurement/core",
       "//components/metrics/proto",
       "//components/safe_browsing_db",
       "//components/safe_json:test_support",
       "//components/strings",
       "//components/webdata_services:test_support",
       "//content/app/resources",
       "//device/bluetooth:mocks",
+      "//device/core:mocks",
       "//device/usb:mocks",
       "//gpu:test_support",
       "//media:test_support",
 
       #'../ppapi/ppapi_internal.gyp:ppapi_unittest_shared',  TODO(GYP)
       "//third_party/leveldatabase",
       "//third_party/libaddressinput",
       "//third_party/libjingle",
       "//third_party/libphonenumber",
       "//third_party/webrtc/modules/desktop_capture",
@@ skipping 14 matching lines @@
       "//components/offline_pages:test_support",
       "//v8:v8_external_startup_data_assets",
       google_play_services_resources,
     ]
     deps -= [ "//third_party/libaddressinput" ]
 
     android_manifest =
         "//chrome/test/android/unit_tests_apk/AndroidManifest.xml"
     enable_multidex = true
     isolate_file = "../unit_tests.isolate"
+
+    # 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 += rebase_path(
             chrome_tests_unit_gypi_values.chrome_unit_tests_non_android_sources,
             ".",
             "//chrome")
     sources -=
         [ "../browser/download/download_request_infobar_delegate_unittest.cc" ]
   }
 
   if (!is_ios && !is_android) {
@@ skipping 48 matching lines @@
   }
 
   if (enable_extensions) {
     sources += rebase_path(
             chrome_tests_unit_gypi_values.chrome_unit_tests_extensions_sources,
             ".",
             "//chrome")
     deps += [
       "//chrome/common/extensions/api",
       "//components/audio_modem:test_support",
-      "//device/core:mocks",
-      "//device/hid:mocks",
       "//extensions:extensions_resources",
       "//extensions/strings",
     ]
     if (enable_service_discovery) {
       sources += rebase_path(
               chrome_tests_unit_gypi_values.chrome_unit_tests_extensions_service_discovery_sources,
               ".",
               "//chrome")
     }
     if (!is_chromeos) {
@@ skipping 499 matching lines @@
 if (is_android) {
   android_library("unit_tests_java") {
     java_files = [ "android/unit_tests_apk/src/org/chromium/chrome/unit_tests_apk/ChromeNativeTestApplication.java" ]
     deps = [
       "//base:base_java",
       "//chrome/android:chrome_java",
       "//content/public/android:content_java",
     ]
   }
 }