Extracting and unittesting PrepareDropDataForChildProcess function.

content/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/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 911 matching lines @@
       "../browser/webrtc/webrtc_depth_capture_browsertest.cc",
       "../browser/webrtc/webrtc_getusermedia_browsertest.cc",
       "../browser/webrtc/webrtc_image_capture_browsertest.cc",
       "../browser/webrtc/webrtc_internals_browsertest.cc",
       "../browser/webrtc/webrtc_ip_permissions_browsertest.cc",
       "../browser/webrtc/webrtc_media_recorder_browsertest.cc",
       "../browser/webrtc/webrtc_webcam_browsertest.cc",
       "../browser/webrtc/webrtc_webcam_browsertest.h",
     ]
     deps += [
+      "//content/public/common:features",
       "//testing/perf",
-      "//content/public/common:features",
     ]
   }
 
   if (enable_plugins) {
     sources += [
       "../renderer/pepper/fake_pepper_plugin_instance.cc",
       "../renderer/pepper/fake_pepper_plugin_instance.h",
       "../renderer/pepper/mock_renderer_ppapi_host.cc",
       "../renderer/pepper/mock_renderer_ppapi_host.h",
       "../renderer/pepper/pepper_device_enumeration_host_helper_unittest.cc",
@@ skipping 134 matching lines @@
     "../browser/download/base_file_win_unittest.cc",
     "../browser/download/download_file_unittest.cc",
     "../browser/download/download_item_impl_unittest.cc",
     "../browser/download/download_job_unittest.cc",
     "../browser/download/download_manager_impl_unittest.cc",
     "../browser/download/download_request_core_unittest.cc",
     "../browser/download/parallel_download_job_unittest.cc",
     "../browser/download/parallel_download_utils_unittest.cc",
     "../browser/download/rate_estimator_unittest.cc",
     "../browser/download/save_package_unittest.cc",
+    "../browser/fileapi/browser_file_system_helper_unittest.cc",
     "../browser/fileapi/file_system_operation_runner_unittest.cc",
     "../browser/fileapi/fileapi_message_filter_unittest.cc",
     "../browser/fileapi/upload_file_system_file_element_reader_unittest.cc",
     "../browser/frame_host/ancestor_throttle_unittest.cc",
     "../browser/frame_host/frame_tree_node_blame_context_unittest.cc",
     "../browser/frame_host/frame_tree_unittest.cc",
     "../browser/frame_host/mixed_content_navigation_throttle_unittest.cc",
     "../browser/frame_host/navigation_controller_impl_unittest.cc",
     "../browser/frame_host/navigation_entry_impl_unittest.cc",
     "../browser/frame_host/navigation_handle_impl_unittest.cc",
@@ skipping 725 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }