Now able to set the localMatrix when creating a SkShader from a SkImage

BUG=skia:2771
R=junov@chromium.org, reed@chromium.org, bsalomon@chromium.org, bsalomon@google.com

Author: piotaixr@chromium.org

Review URL: https://codereview.chromium.org/409653003
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 9e136f5..c812f58 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -78,8 +78,10 @@
     return as_IB(this)->onGetTexture();
 }
 
-SkShader* SkImage::newShader(SkShader::TileMode tileX, SkShader::TileMode tileY) const {
-    return as_IB(this)->onNewShader(tileX, tileY);
+SkShader* SkImage::newShader(SkShader::TileMode tileX,
+                             SkShader::TileMode tileY,
+                             const SkMatrix* localMatrix) const {
+    return as_IB(this)->onNewShader(tileX, tileY, localMatrix);
 }
 
 SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const {