Enable Skia rasterpipeline for tiling

(remove SK_SUPPORT_LEGACY_TILED_BITMAPS)

Change-Id: Ic4552ede98e6690d3067695e01c90c81cb357cef
Reviewed-on: https://chromium-review.googlesource.com/545816
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488431}

skia/config/SkUserConfig.h

@@ -212,14 +212,6 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #define SK_DISABLE_DEFERRED_PROXIES
 #endif
 
-#ifndef SK_SUPPORT_LEGACY_TILED_BITMAPS
-#define SK_SUPPORT_LEGACY_TILED_BITMAPS
-#endif
-
-#ifndef SK_SUPPORT_NONSTD_BLENDMODES
-#define SK_SUPPORT_NONSTD_BLENDMODES
-#endif
-
 ///////////////////////// Imported from BUILD.gn and skia_common.gypi
 
 /* In some places Skia can use static initializers for global initialization,