PlzNavigate: make MHTML iframe load working.

third_party/WebKit/Source/web/LocalFrameClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 56 matching lines @@
 #include "modules/serviceworkers/NavigatorServiceWorker.h"
 #include "modules/serviceworkers/ServiceWorkerLinkResource.h"
 #include "modules/storage/DOMWindowStorageController.h"
 #include "modules/vr/NavigatorVR.h"
 #include "platform/Histogram.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/exported/WrappedResourceRequest.h"
 #include "platform/exported/WrappedResourceResponse.h"
 #include "platform/feature_policy/FeaturePolicy.h"
+#include "platform/loader/fetch/ResourceFetcher.h"
 #include "platform/network/HTTPParsers.h"
 #include "platform/network/mime/MIMETypeRegistry.h"
 #include "platform/plugins/PluginData.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/StringExtras.h"
 #include "platform/wtf/text/CString.h"
 #include "platform/wtf/text/WTFString.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebApplicationCacheHost.h"
 #include "public/platform/WebMediaPlayerSource.h"
@@ skipping 420 matching lines @@
   navigation_info.extra_data = ds ? ds->GetExtraData() : nullptr;
   navigation_info.replaces_current_history_item = replaces_current_history_item;
   navigation_info.is_history_navigation_in_new_child_frame =
       is_history_navigation_in_new_child_frame;
   navigation_info.is_client_redirect = is_client_redirect;
   navigation_info.should_check_main_world_content_security_policy =
       should_check_main_world_content_security_policy ==
               kCheckContentSecurityPolicy
           ? kWebContentSecurityPolicyDispositionCheck
           : kWebContentSecurityPolicyDispositionDoNotCheck;
+
+  if (IsLoadedAsMHTMLArchive()) {

[Nate Chapin, 2017/05/05 20:34:18]

Could we inline this and share some logic with
is_history_navigation_in_new_child_frame above?

At least getting the parent LocalFrame* (or setting it to nullptr if there's no
parent or it's not local) would make both pieces more readable I think.

+    navigation_info.archive_status =
+        WebFrameClient::NavigationPolicyInfo::ArchiveStatus::Present;
+  }
+
   // Caching could be disabled for requests initiated by DevTools.
   // TODO(ananta)
   // We should extract the network cache state into a global component which
   // can be queried here and wherever necessary.
   navigation_info.is_cache_disabled =
       DevToolsAgent() ? DevToolsAgent()->CacheDisabled() : false;
   if (form)
     navigation_info.form = WebFormElement(form);
 
   std::unique_ptr<SourceLocation> source_location =
@@ skipping 438 matching lines @@
   if (web_frame_->Client())
     return web_frame_->Client()->GetEffectiveConnectionType();
   return WebEffectiveConnectionType::kTypeUnknown;
 }
 
 WebDevToolsAgentImpl* LocalFrameClientImpl::DevToolsAgent() {
   return WebLocalFrameImpl::FromFrame(web_frame_->GetFrame()->LocalFrameRoot())
       ->DevToolsAgentImpl();
 }
 
+bool LocalFrameClientImpl::IsLoadedAsMHTMLArchive() const {
+  WebFrame* parent_frame = web_frame_->Parent();
+  if (!parent_frame)
+    return false;
+
+  // TODO(nasko): How should this work with OOPIF?
+  // The MHTMLArchive is parsed as a whole, but can be constructed from frames
+  // in multiple processes. In that case, which process should parse it and how
+  // should the output be spread back across multiple processes?
+  if (!parent_frame->IsWebLocalFrame())
+    return false;
+
+  return ToWebLocalFrameImpl(parent_frame)
+      ->GetFrame()
+      ->Loader()
+      .GetDocumentLoader()
+      ->Fetcher()
+      ->Archive();
+}
+
 KURL LocalFrameClientImpl::OverrideFlashEmbedWithHTML(const KURL& url) {
   return web_frame_->Client()->OverrideFlashEmbedWithHTML(WebURL(url));
 }
 
 void LocalFrameClientImpl::SetHasReceivedUserGesture(bool received_previously) {
   // The client potentially needs to dispatch the event to other processes only
   // for the first time.
   if (!received_previously && web_frame_->Client())
     web_frame_->Client()->SetHasReceivedUserGesture();
   // WebAutofillClient reacts only to the user gestures for this particular
   // frame. |received_previously| is ignored because it may be true due to an
   // event in a child frame.
   if (WebAutofillClient* autofill_client = web_frame_->AutofillClient())
     autofill_client->UserGestureObserved();
 }
 
 void LocalFrameClientImpl::AbortClientNavigation() {
   if (web_frame_->Client())
     web_frame_->Client()->AbortClientNavigation();
 }
 
 TextCheckerClient& LocalFrameClientImpl::GetTextCheckerClient() const {
   return web_frame_->GetTextCheckerClient();
 }
 
 }  // namespace blink