Replace hand-written IDBObserverCallback with auto-generated code

third_party/WebKit/Source/modules/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/split_static_library.gni")
 import("//build/config/chromecast_build.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/v8.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 40 matching lines @@
 
   visibility = []  # Allow re-assignment of list.
   visibility = [ "//third_party/WebKit/*" ]
 
   sources = [
     "ModulesInitializer.cpp",
     "ModulesInitializer.h",
   ]
 
   sources += generated_modules_dictionary_files
+  sources += generated_modules_callback_function_files
 
   # Compile sources generated by module_names script.
   sources += get_target_outputs(":module_names")
 
   sources += bindings_modules_v8_files
   sources += rebase_path(bindings_modules_generated_interface_files, ".", "//")
   sources += rebase_path(bindings_modules_generated_union_type_files, ".", "//")
   sources +=
       rebase_path(bindings_modules_generated_partial_interface_files, ".", "//")
   sources +=
@@ skipping 216 matching lines @@
     ":modules",
     ":modules_testing",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/WebKit/Source/core",
     "//third_party/WebKit/Source/wtf",
     "//v8",
   ]
 }