Revert "remove SK_SUPPORT_LEGACY_CLIP_REGIONOPS"

This reverts commit 8e7432b7f98dd592e529a0c8bb038d73ebfb0478.

Reason for revert: <INSERT REASONING HERE>

external/skia/bench/../tools/android/SkAndroidSDKCanvas.h:103:36: error: C++ requires a type specifier for all declarations
    void onClipRect(const SkRect&, ClipOp, ClipEdgeStyle) override;

Original change's description:
> remove SK_SUPPORT_LEGACY_CLIP_REGIONOPS
> 
> 
> switch over to SkClipOps now that SK_SUPPORT_LEGACY_CLIP_REGIONOPS is gone
> 
> BUG=skia:
> 
> Change-Id: Ifdc8b3746d508348a40cc009a4e529a1cb3c405d
> Reviewed-on: https://skia-review.googlesource.com/5714
> Commit-Queue: Mike Reed <reed@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
> 

TBR=reed@google.com,reviews@skia.org
BUG=skia:
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: If26ea91d7464615e43c1d3d2f726e337ff56b55c
Reviewed-on: https://skia-review.googlesource.com/5721
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/src/gpu/GrClipStackClip.cpp b/src/gpu/GrClipStackClip.cpp
index 13e6024..548f5b7 100644
--- a/src/gpu/GrClipStackClip.cpp
+++ b/src/gpu/GrClipStackClip.cpp
@@ -167,10 +167,10 @@
     for (ElementList::Iter iter(reducedClip.elements()); iter.get(); iter.next()) {
         const Element* element = iter.get();
 
-        SkClipOp op = element->getOp();
+        SkCanvas::ClipOp op = element->getOp();
         bool invert = element->isInverseFilled();
         bool needsStencil = invert ||
-                            kIntersect_SkClipOp == op || kReverseDifference_SkClipOp == op;
+                            SkCanvas::kIntersect_Op == op || SkCanvas::kReverseDifference_Op == op;
 
         if (PathNeedsSWRenderer(context, hasUserStencilSettings,
                                 renderTargetContext, translate, element, nullptr, needsStencil)) {
@@ -191,7 +191,7 @@
     SkSTArray<kMaxAnalyticElements, sk_sp<GrFragmentProcessor>> fps;
     ElementList::Iter iter(elements);
     while (iter.get()) {
-        SkClipOp op = iter.get()->getOp();
+        SkCanvas::ClipOp op = iter.get()->getOp();
         bool invert;
         bool skip = false;
         switch (op) {
@@ -449,14 +449,14 @@
 
     for (ElementList::Iter iter(reducedClip.elements()); iter.get(); iter.next()) {
         const Element* element = iter.get();
-        SkClipOp op = element->getOp();
+        SkCanvas::ClipOp op = element->getOp();
 
-        if (kIntersect_SkClipOp == op || kReverseDifference_SkClipOp == op) {
+        if (SkCanvas::kIntersect_Op == op || SkCanvas::kReverseDifference_Op == op) {
             // Intersect and reverse difference require modifying pixels outside of the geometry
             // that is being "drawn". In both cases we erase all the pixels outside of the geometry
             // but leave the pixels inside the geometry alone. For reverse difference we invert all
             // the pixels before clearing the ones outside the geometry.
-            if (kReverseDifference_SkClipOp == op) {
+            if (SkCanvas::kReverseDifference_Op == op) {
                 SkRect temp = SkRect::Make(reducedClip.ibounds());
                 // invert the entire scene
                 helper.drawRect(temp, SkRegion::kXOR_Op, false, 0xFF);