fix text matrix again

The text matrix for Skia is still wrong.
The last fix allowed text to draw correctly when rotated,
but did not draw correctly when skewed.

With this edit, text draws correctly rotated, skewed
horizontally, skewed vertically, and rotated and skewed.

R=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2189093002
diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index a5c509e..df20203 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -137,7 +137,7 @@
 // use when pdf's y-axis points up insead of down
 SkMatrix ToFlippedSkMatrix(const CFX_Matrix& m) {
   SkMatrix skMatrix;
-  skMatrix.setAll(m.a, -m.b, m.e, m.c, -m.d, m.f, 0, 0, 1);
+  skMatrix.setAll(m.a, -m.c, m.e, m.b, -m.d, m.f, 0, 0, 1);
   return skMatrix;
 }