Adds a feature to MHTML serialization that omits subframes and subresources marked no-store.

content/browser/DEPS

 include_rules = [
   # Allow inclusion of specific components that we depend on. We may only
   # depend on components which we share with the mojo html_viewer.
   "+components/filesystem",
   "+components/leveldb",
   "+components/link_header_util",
   "+components/mime_util",
   "+components/mus/public/interfaces",
   "+components/mus/public",
   "+components/profile_service",
@@ skipping 68 matching lines @@
   "+third_party/WebKit/public/platform/modules/serviceworker/service_worker_event_status.mojom.h",
   "+third_party/WebKit/public/platform/modules/vr/WebVR.h",
   "+third_party/WebKit/public/platform/modules/wake_lock/wake_lock_service.mojom.h",
   "+third_party/WebKit/public/web/WebAXEnums.h",
   "+third_party/WebKit/public/web/WebCompositionUnderline.h",
   "+third_party/WebKit/public/web/WebConsoleMessage.h",
   "+third_party/WebKit/public/web/WebContentSecurityPolicy.h",
   "+third_party/WebKit/public/web/WebDeviceEmulationParams.h",
   "+third_party/WebKit/public/web/WebDragStatus.h",
   "+third_party/WebKit/public/web/WebFindOptions.h",
+  "+third_party/WebKit/public/web/WebFrameSerializerCacheControlPolicy.h",

[ncarter (slow), 2016/05/23 23:00:29]

This is fine.

   "+third_party/WebKit/public/web/WebFrameOwnerProperties.h",
   "+third_party/WebKit/public/web/WebInputEvent.h",
   "+third_party/WebKit/public/web/WebMediaPlayerAction.h",
   "+third_party/WebKit/public/web/WebPluginAction.h",
   "+third_party/WebKit/public/web/WebPopupType.h",
   "+third_party/WebKit/public/web/WebSandboxFlags.h",
   "+third_party/WebKit/public/web/WebSerializedScriptValueVersion.h",
   "+third_party/WebKit/public/web/WebSharedWorkerCreationContextType.h",
   "+third_party/WebKit/public/web/WebSharedWorkerCreationErrors.h",
   "+third_party/WebKit/public/web/WebTextDirection.h",
@@ skipping 21 matching lines @@
     "+content/public/browser/power_save_blocker.h",
 
     # These dependencies need to be removed.
     "!content/browser/android/content_view_core_impl.h",
     "!content/browser/web_contents/web_contents_impl.h",
     "!content/public/browser/android/content_view_core.h",
     "!content/public/browser/browser_thread.h",
     "!content/public/browser/web_contents_observer.h",
   ]
 }