resolution dependent path measure

When a dash is drawn through a canvas with a scaled up
matrix, path measure needs the pixel resolution through
the matrix to construct the dash with sufficient
resolution.

Pass the resolution through to path measure.

Replicate chrome bug in skia GM.

R=reed@google.com
BUG=530095
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1608353002

Review URL: https://codereview.chromium.org/1608353002
diff --git a/src/gpu/GrBlurUtils.cpp b/src/gpu/GrBlurUtils.cpp
index 9ca445b..8a8ab78 100644
--- a/src/gpu/GrBlurUtils.cpp
+++ b/src/gpu/GrBlurUtils.cpp
@@ -287,6 +287,7 @@
     SkASSERT(!pathIsMutable || origSrcPath.isVolatile());
 
     GrStrokeInfo strokeInfo(paint);
+    strokeInfo.setResScale(SkDraw::ComputeResScaleForStroking(origViewMatrix));
 
     // If we have a prematrix, apply it to the path, optimizing for the case
     // where the original path can in fact be modified in place (even though