Convert WebRange to be a simple pair of numbers.

third_party/WebKit/public/web/WebSurroundingText.h

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "../platform/WebString.h"
 #include "WebNode.h"
 #include "WebRange.h"
 #include <memory>
 
 namespace blink {
 
 class SurroundingText;
 class WebNode;
 class WebRange;
+class WebLocalFrame;
 struct WebPoint;
 
 // WebSurroundingText is a Blink API that gives access to the SurroundingText
 // API. It allows caller to know the text surrounding a point or a range.
 class WebSurroundingText {
 public:
     BLINK_EXPORT WebSurroundingText();
     BLINK_EXPORT ~WebSurroundingText();
 
     BLINK_EXPORT bool isNull() const;
 
     // Initializes the object to get the surrounding text centered in the
     // position relative to a provided node.
     // The maximum length of the contents retrieved is defined by maxLength.
     BLINK_EXPORT void initialize(const WebNode&, const WebPoint&, size_t maxLength);
-
-    // Initializes the object to get the text surrounding a given range.
+    // Initializes the object with the current selection in a given frame.
     // The maximum length of the contents retrieved is defined by maxLength.
     // It does not include the text inside the range.
-    BLINK_EXPORT void initialize(const WebRange&, size_t maxLength);
+    BLINK_EXPORT void initializeFromCurrentSelection(WebLocalFrame*, size_t maxLength);
 
     // Surrounding text content retrieved.
     BLINK_EXPORT WebString textContent() const;
 
     // Offset in the text content of the initial hit position (or provided
     // offset in the node).
     // This should only be called when WebSurroundingText has been initialized
     // with a WebPoint.
     // DEPRECATED: use startOffsetInTextContent() or endOffsetInTextContent().
     BLINK_EXPORT size_t hitOffsetInTextContent() const;
 
     // Start offset of the initial text in the text content.
     BLINK_EXPORT size_t startOffsetInTextContent() const;
 
     // End offset of the initial text in the text content.
     BLINK_EXPORT size_t endOffsetInTextContent() const;
 
 protected:
     std::unique_ptr<SurroundingText> m_private;
 };
 
 } // namespace blink
 
 #endif