Move SkShader::fLocalMatrix into SkShader constructor.

gm/pictureshader.cpp

Index: gm/pictureshader.cpp
diff --git a/gm/pictureshader.cpp b/gm/pictureshader.cpp
index 195ee738bc9ba71dad1068581a6fd6808f2a7a77..ef0ce180acea2d61916566d0dc019a388a5dcc3c 100644
--- a/gm/pictureshader.cpp
+++ b/gm/pictureshader.cpp
@@ -141,12 +141,14 @@ private:
         canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
         canvas->drawRect(SkRect::MakeXYWH(fSceneSize * 1.1f, 0, fSceneSize, fSceneSize), paint);
 
+        // TODO(dominikg): I think we either need to wrap these or create from scratch each time.
         fPictureShaders[tileMode]->setLocalMatrix(localMatrix);
         paint.setShader(fPictureShaders[tileMode].get());
         canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
 
         canvas->translate(fSceneSize * 1.1f, 0);
 
+        // TODO(dominikg): Same as above.
         fBitmapShaders[tileMode]->setLocalMatrix(localMatrix);
         paint.setShader(fBitmapShaders[tileMode].get());
         canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);