SaveFlags be-gone

Remove the deprecated save(SaveFlags), willSave(SaveFlags) and all
traces of kMatrix_SaveFlags/kClip_SaveFlag.

BUG=skia:2297
R=mtklein@google.com, reed@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/340403003
diff --git a/src/pipe/SkGPipeRead.cpp b/src/pipe/SkGPipeRead.cpp
index 41c417f..9047e82 100644
--- a/src/pipe/SkGPipeRead.cpp
+++ b/src/pipe/SkGPipeRead.cpp
@@ -317,7 +317,7 @@
 
 static void save_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
                     SkGPipeState* state) {
-    canvas->save((SkCanvas::SaveFlags)DrawOp_unpackData(op32));
+    canvas->save();
 }
 
 static void saveLayer_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,