Handle stroked single line special case in Ganesh

src/gpu/batches/GrAAFillRectBatch.cpp

Index: src/gpu/batches/GrAAFillRectBatch.cpp
diff --git a/src/gpu/batches/GrAAFillRectBatch.cpp b/src/gpu/batches/GrAAFillRectBatch.cpp
index 859328af3b369528aa075f5b30eae75521ac05c6..2c90b8bcf2e06558dbb8d68ecc3d721363a1cc00 100644
--- a/src/gpu/batches/GrAAFillRectBatch.cpp
+++ b/src/gpu/batches/GrAAFillRectBatch.cpp
@@ -84,10 +84,12 @@ static void generate_aa_fill_rect_geometry(intptr_t verts,
     SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts);
     SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride);
 
-    SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1);
-    inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
+    SkScalar inset;
 
     if (viewMatrix.rectStaysRect()) {
+        inset = SkMinScalar(devRect.width(), SK_Scalar1);
+        inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height());
+
         set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf);
         set_inset_fan(fan1Pos, vertexStride, devRect, inset,  inset);
     } else {
@@ -97,11 +99,14 @@ static void generate_aa_fill_rect_geometry(intptr_t verts,
           { viewMatrix[SkMatrix::kMSkewX],  viewMatrix[SkMatrix::kMScaleY] }
         };
 
-        vec[0].normalize();
+        SkScalar len1 = SkPoint::Normalize(&vec[0]);
         vec[0].scale(SK_ScalarHalf);
-        vec[1].normalize();
+        SkScalar len2 = SkPoint::Normalize(&vec[1]);
         vec[1].scale(SK_ScalarHalf);
 
+        inset = SkMinScalar(len1 * rect.width(), SK_Scalar1);
+        inset = SK_ScalarHalf * SkMinScalar(inset, len2 * rect.height());
+
         // create the rotated rect
         fan0Pos->setRectFan(rect.fLeft, rect.fTop,
                             rect.fRight, rect.fBottom, vertexStride);