Add ability to compute text intercepts to Font

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

Index: third_party/WebKit/Source/platform/graphics/GraphicsContext.h
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsContext.h b/third_party/WebKit/Source/platform/graphics/GraphicsContext.h
index 24566fbd1ce3a313dee0d346ef072fa775a293e8..946bdd4a01db54d06edf67e60014ea4368594a06 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsContext.h
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsContext.h
@@ -263,6 +263,11 @@ class PLATFORM_EXPORT GraphicsContext {
                             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,