Remove GrTextureOp AA legacy flag and rebaseline tests

Change-Id: I970adfa9998f261d1f2d604aa7fe31c73335a80f
Reviewed-on: https://chromium-review.googlesource.com/1188608Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Cr-Commit-Position: refs/heads/master@{#586694}

skia/config/SkUserConfig.h

@@ -185,9 +185,6 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 // Max. verb count for paths rendered by the edge-AA tessellating path renderer.
 #define GR_AA_TESSELLATOR_MAX_VERB_COUNT 100
 
-// Remove this and rebaseline affected layout tests.
-#define SK_DONT_DROP_UNNECESSARY_AA_IN_TEXTURE_OP
-
 #ifndef SK_SUPPORT_LEGACY_THREADED_DAA_BUGS
 #define SK_SUPPORT_LEGACY_THREADED_DAA_BUGS
 #endif

third_party/WebKit/LayoutTests/platform/mac-mac10.11/virtual/threaded/fast/scroll-behavior/overscroll-behavior-expected.txt

+This is a testharness.js-based test.
+PASS overscroll-behavior-y: none should only prevent scroll propagation on y axis with: wheel.
+FAIL overscroll-behavior-x: none should only prevent scroll propagation on x axis with: wheel. assert_equals: expected 100 but got 66
+PASS overscroll-behavior should not affect scrolling inside the applied container with: wheel.
+PASS overscroll-behavior on non-scrollable area should not affect scroll propagation with: wheel.
+Harness: the test ran to completion.
+