Move SkShader::fLocalMatrix into SkShader constructor.

As a first step towards removing SkShader::setLocalMatrix, which will make
SkShader thread-safe, remove calls to setLocalMatrix that happen immediately
after the shader is being created. Instead, pass the matrix into the constructor
or factory method.

BUG=skia:1976
R=scroggo@google.com, reed@google.com, skyostil@google.com, mtklein@google.com

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/245963010

git-svn-id: http://skia.googlecode.com/svn/trunk@14401 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleDash.cpp b/samplecode/SampleDash.cpp
index 26d3694..e4fa79d 100644
--- a/samplecode/SampleDash.cpp
+++ b/samplecode/SampleDash.cpp
@@ -28,8 +28,7 @@
     matrix.setScale(SkIntToScalar(width), SK_Scalar1);
 
     SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
-                                               SkShader::kClamp_TileMode);
-    s->setLocalMatrix(matrix);
+                                               SkShader::kClamp_TileMode, &matrix);
 
     paint->setShader(s)->unref();
 }