Extend WebSurroundingText to accept a WebRange.

public/web/WebFrame.h

Index: public/web/WebFrame.h
diff --git a/public/web/WebFrame.h b/public/web/WebFrame.h
index d630f801834c1614177372f90fccbcb1fbaf5bcd..681ef44189d1333a0ad2701eef21d1378fac6ecf 100644
--- a/public/web/WebFrame.h
+++ b/public/web/WebFrame.h
@@ -474,6 +474,15 @@ public:
 
     virtual void setCaretVisible(bool) = 0;
 
+    // Returns the text surrounding the selection with a maximum length of
+    // |maxLength|. |startOffset| and |endOffset| will be populated with
+    // respectively the start and end offset of the selection relatively to the
+    // returned text. If the selection is a caret, |startOffset| will be equal
+    // to |endOffset|.
+    // Note: the surrounding text length is |maxLength| which means that the
+    // returned text will be at max selectionLength + maxLength.
+    virtual WebString textSurroundingSelection(int maxLength, int* startOffset, int* endOffset) const = 0;

[Yuta Kitamura, 2014/06/06 02:20:08]

1. We usually use non-const references for output arguments,
   instead of non-const pointers.

2. I'm not sure why we need to add this method to WebFrame.
   Is there any reason you cannot extend WebSurroundingText
   interface?

+
     // Printing ------------------------------------------------------------
 
     // Reformats the WebFrame for printing. WebPrintParams specifies the printable