Add ability to compute text intercepts to Font

third_party/WebKit/Source/platform/graphics/GraphicsContext.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  * Copyright (C) 2013 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.
@@ skipping 245 matching lines @@
       const FloatPoint&,
       Font::CustomFontNotReadyAction = Font::DoNotPaintIfFontNotReady);
   void drawHighlightForText(const Font&,
                             const TextRun&,
                             const FloatPoint&,
                             int h,
                             const Color& backgroundColor,
                             int from = 0,
                             int to = -1);
 
+  int getTextIntercepts(const Font&,

[f(malita), 2016/10/13 18:09:19]

Is there much value in exposing this helper on GraphicsContext?  In general,
we've been trying to move state out of it for a while, so e.g. I'd like to no
longer push the text paint to GC but instead use a local SkPaint at some point.

I would think the Font API should suffice, even if for now we're going to grab
the fill paint & DSF from GraphicsContext explicitly.

[drott, 2016/10/14 15:15:34]

No, as mentioned above, I initially thought, I'd need the SkCanvas, but I don't.
Yes, sounds good to me, changed accordingly.

+                        const TextRunPaintInfo&,
+                        const SkScalar* bounds,
+                        SkScalar* intervals);
+
   void drawLineForText(const FloatPoint&, float width, bool printing);
   enum DocumentMarkerLineStyle {
     DocumentMarkerSpellingLineStyle,
     DocumentMarkerGrammarLineStyle
   };
   void drawLineForDocumentMarker(const FloatPoint&,
                                  float width,
                                  DocumentMarkerLineStyle);
 
   // beginLayer()/endLayer() behave like save()/restore() for CTM and clip
@@ skipping 187 matching lines @@
 
   float m_deviceScaleFactor;
 
   unsigned m_printing : 1;
   unsigned m_hasMetaData : 1;
 };
 
 }  // namespace blink
 
 #endif  // GraphicsContext_h