Revert of Revert of Fix SkPaint::measureText for stroked hairline text

Revert of Revert of Fix SkPaint::measureText for stroked hairline text (https://codereview.chromium.org/354433002/)

Reason for revert:
Rebaseline CL is ready to be submitted

Original issue's description:
> Revert of Fix SkPaint::measureText for stroked hairline text (https://codereview.chromium.org/335603003/)
> 
> Reason for revert:
> Caused many shadertext GM failures
> 
> Original issue's description:
> > Fix SkPaint::measureText for stroked hairline text
> > 
> > SkPaint::measureText and text drawing used different criteria for
> > determining whether text should be drawn as paths or not.
> > 
> > Adds tests glyph_pos_(h/n)_(s/f/b) to test the text rendering and the glyph
> > positioning in the rendering. Mainly added in order to define what is the
> > expected text rendering when hairline stroke is used with various transform
> > options.
> > 
> > The testcase also tries to note or highlight the fact that SkPaint::measureText
> > is not expected to produce intuitively matching results when compared to a
> > rendering, if the rendering is done so that the device ends up having a device
> > transform.
> > 
> > This fixes the glyph_pos_h_s (hairline, stroked) test-case.
> > 
> > Ignore shadertext2_pdf-poppler.png gm on
> > Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug temporarily, as that fails.
> > 
> > Committed: https://skia.googlesource.com/skia/+/196af738027c5e18c3eb792dbcaf90ef27821793
> 
> TBR=jvanverth@google.com,reed@google.com,kkinnunen@nvidia.com
> NOTREECHECKS=true
> NOTRY=true
> 
> Committed: https://skia.googlesource.com/skia/+/abc9bb55ddfeb4b1a7acc335a34841fddcd22d27

TBR=jvanverth@google.com,reed@google.com,kkinnunen@nvidia.com
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/c4b84aef1adeb68bc853f35abb85b79fa1fcaac6

[rmistry, 2014-06-23 13:58:37]

Created Revert of Revert of Fix SkPaint::measureText for stroked hairline text

[commit-bot: I haz the power, 2014-06-23 13:59:11]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/rmistry@google.com/349153005/1

[commit-bot: I haz the power, 2014-06-23 13:59:22]

Change committed as c4b84aef1adeb68bc853f35abb85b79fa1fcaac6