Change how DOM Inspector fetches document's base URL.

third_party/WebKit/Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 500 matching lines @@
 
     // To understand how these concepts relate to one another, please see the
     // comments surrounding their declaration.
     const KURL& baseURL() const { return m_baseURL; }
     void setBaseURLOverride(const KURL&);
     const KURL& baseURLOverride() const { return m_baseURLOverride; }
     const KURL& baseElementURL() const { return m_baseElementURL; }
     const AtomicString& baseTarget() const { return m_baseTarget; }
     void processBaseElement();
 
+    // Creates URL based on passed relative url and this documents base URL.
+    // Depending on base URL value it is possible that parent document
+    // base URL will be used instead. Uses completeURLWithOverride internally.
     KURL completeURL(const String&) const;
+    // Creates URL based on passed relative url and passed base URL override.
+    // Depending on baseURLOverride value it is possible that parent document
+    // base URL will be used instead of it. See baseURLForOverride function
+    // for details.
     KURL completeURLWithOverride(const String&, const KURL& baseURLOverride) const;
+    // Determines which base URL should be used given specified override.
+    // If override is empty or is about:blank url and parent document exists
+    // base URL of parent will be returned, passed base URL override otherwise.
+    const KURL& baseURLForOverride(const KURL& baseURLOverride) const;
 
     String userAgent() const final;
     void disableEval(const String& errorMessage) final;
 
     CSSStyleSheet& elementSheet();
 
     virtual PassRefPtrWillBeRawPtr<DocumentParser> createParser();
     DocumentParser* parser() const { return m_parser.get(); }
     ScriptableDocumentParser* scriptableDocumentParser() const;
 
@@ skipping 900 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h