Stop using WebCore namespace in generated code

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("//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/make_file_arrays.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
@@ skipping 40 matching lines @@
     ]
   }
 }
 
 # GYP version: WebKit/Source/modules/modules.gyp:modules (CachePolyfill action)
 make_file_arrays("modules_cache_polyfill") {
   filename = "modules/CachePolyfill"
   resources = [
     "serviceworkers/polyfills/cachePolyfill.js",
   ]
-  namespace = "WebCore"
+  namespace = "blink"
 }
 
 # GYP version: WebKit/Source/modules/modules.gyp:modules (CacheStoragePolyfill action)
 make_file_arrays("modules_cache_storage_polyfill") {
   filename = "modules/CacheStoragePolyfill"
   resources = [
     "serviceworkers/polyfills/cacheStoragePolyfill.js",
   ]
-  namespace = "WebCore"
+  namespace = "blink"
 }
 
 # GYP version: WebKit/Source/modules/modules.gyp:modules_testing
 source_set("modules_testing") {
   sources = modules_testing_files
 
   configs += [
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     "//third_party/WebKit/Source/core",
   ]
 }
 
 # GYP version: WebKit/Source/modules/modules.gyp:make_modules_generated
 group("make_modules_generated") {
   deps = [
     "//third_party/WebKit/Source/core:core_event_interfaces",
     "//third_party/WebKit/Source/bindings/modules:bindings_modules_generated",
   ]
 }