[RenderText] Adding vertical alignment options

ui/gfx/canvas.h

Index: ui/gfx/canvas.h
diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index 88882fa2f765d1c754655df1e688588615e4124c..96b2b941f51d4544ebdc897f81d1df704823c478 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -69,6 +69,11 @@ class GFX_EXPORT Canvas {
     // when rendering text onto a fully- or partially-transparent background
     // that will later be blended with another image.
     NO_SUBPIXEL_RENDERING = 1 << 9,
+
+    // Specifies the alignment for text rendered with the DrawStringRect method.

[msw, 2015/04/01 15:07:17]

Let's not add these flags unless they are imminently needed (I hope we can
deprecate the canvas string drawing functions eventually).

+    TEXT_ALIGN_TOP = 1 << 10,
+    TEXT_ALIGN_MIDDLE = 1 << 11,
+    TEXT_ALIGN_BOTTOM = 1 << 12,
   };
 
   // Creates an empty canvas with image_scale of 1x.