WebView loadDataWithBaseURL() was determined as a same page navigation

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2007 matching lines @@
   // If we are loading substitute data to replace an existing load, then
   // inherit all of the properties of that original request. This way,
   // reload will re-attempt the original request. It is essential that
   // we only do this when there is an unreachableURL since a non-empty
   // unreachableURL informs FrameLoader::reload to load unreachableURL
   // instead of the currently loaded URL.
   ResourceRequest request;
   if (replace && !unreachableURL.isEmpty() &&
       frame()->loader().provisionalDocumentLoader())
     request = frame()->loader().provisionalDocumentLoader()->originalRequest();
+  // TODO(crbug.com/662823): Calling setURL with baseURL is wrong, but Blink
+  // does not provide a right solution to set base URL at loading time now.
+  // This may cause some troubles, e.g. FrameLoader can not detect the same page
+  // navigation correctly as far as we know.
   request.setURL(baseURL);
   request.setCheckForBrowserSideNavigation(false);
 
   FrameLoadRequest frameRequest(
       0, request, SubstituteData(data, mimeType, textEncoding, unreachableURL));
   DCHECK(frameRequest.substituteData().isValid());
   frameRequest.setReplacesCurrentItem(replace);
   if (isClientRedirect)
     frameRequest.setClientRedirect(ClientRedirectPolicy::ClientRedirect);
 
@@ skipping 341 matching lines @@
     feature = UseCounter::ChromeLoadTimesConnectionInfo;
   }
   UseCounter::count(frame(), feature);
 }
 
 WebInputMethodControllerImpl* WebLocalFrameImpl::inputMethodController() const {
   return m_inputMethodController.get();
 }
 
 }  // namespace blink