Revert of Transform ImagePreReader into PreReadFile.

chrome/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/features.gni")
 import("//build/config/locales.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build/config/win/manifest.gni")
@@ skipping 105 matching lines @@
         "app/main_dll_loader_win.h",
         "app/signature_validator_win.cc",
         "app/signature_validator_win.h",
         "common/crash_keys.cc",
         "common/crash_keys.h",
       ]
 
       deps += [
         ":chrome_dll",
         ":chrome_exe_version",
-        ":file_pre_reader",
+        ":image_pre_reader",
 
         # 'chrome_nacl_win64" TODO(GYP) bug 512869
         # '../win8/delegate_execute/delegate_execute.gyp:*', TODO(GYP) bug 512867
         # '../win8/metro_driver/metro_driver.gyp:metro_driver', TODO(GYP) bug 512864
         "//base",
         "//breakpad:breakpad_handler",
         "//breakpad:breakpad_sender",
         "//chrome/app/version_assembly:chrome_exe_manifest",
         "//chrome/browser:chrome_process_finder",
         "//chrome/chrome_watcher",
@@ skipping 373 matching lines @@
   }
 
   process_version("other_version") {
     template_file = chrome_version_rc_template
     sources = [
       "app/other.ver",
     ]
     output = "$target_gen_dir/other_version.rc"
   }
 
-  source_set("file_pre_reader") {
+  source_set("image_pre_reader") {
     sources = [
-      "app/file_pre_reader_win.cc",
-      "app/file_pre_reader_win.h",
+      "app/image_pre_reader_win.cc",
+      "app/image_pre_reader_win.h",
     ]
     deps = [
       "//base",
     ]
   }
 }
 
 # GYP version: chrome/chrome_resources.gyp:chrome_resources
 group("resources") {
   public_deps = [
@@ skipping 519 matching lines @@
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }