Reland "Move GrGeometryProcessor's textures out of classes and into"

This reverts commit fdf05f4ff4e96e28a31e210cb471d149d736f528.

Reason for revert: Android fixed after removing multitexture support from TextureOp.

Original change's description:
> Revert "Move GrGeometryProcessor's textures out of classes and into"
> 
> This reverts commit af87483873f0b370b90ebe956301a13cc8662cbe.
> 
> Revert "GrGeometryProcessor derives from GrNonAtomicRef not GrProgramElement."
> 
> This reverts commit 607be37e3d4ddbe2163c200d6e13bcee981f6bf7.
> 
> Revert "Store GrMeshDrawOps' meshes in GrOpFlushState's arena."
> 
> This reverts commit b948572c7862214fe2e1fa6cdfcab4fc7b1666ac.
> 
> Revert "Remove multitexturing support from GrTextureOp."
> 
> This reverts commit 986f64c601f3ed99f84f0c392d1a42e298f6d618.
> 
> Revert "Make result of GrOp::combineIfPossible be an enum."
> 
> This reverts commit 641ac7daa81cbfca06b310803fb1a607d0fc2b32.
> 
> Bug: b/112244393
> Change-Id: I579491a3f2f2f2093f1e2a6141fa1e4cc7b760a4
> Reviewed-on: https://skia-review.googlesource.com/145646
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com

Change-Id: I1d41c2ecf7862e31fb025a7a00bb07bae9d83a47
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b/112244393
Reviewed-on: https://skia-review.googlesource.com/145780
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/ops/GrRegionOp.cpp b/src/gpu/ops/GrRegionOp.cpp
index d0c24e6..b876295 100644
--- a/src/gpu/ops/GrRegionOp.cpp
+++ b/src/gpu/ops/GrRegionOp.cpp
@@ -129,9 +129,9 @@
             return;
         }
         sk_sp<const GrBuffer> indexBuffer = target->resourceProvider()->refQuadIndexBuffer();
-        PatternHelper helper(GrPrimitiveType::kTriangles);
-        void* vertices = helper.init(target, kVertexStride, indexBuffer.get(), kVertsPerInstance,
-                                     kIndicesPerInstance, numRects);
+        PatternHelper helper(target, GrPrimitiveType::kTriangles, kVertexStride, indexBuffer.get(),
+                             kVertsPerInstance, kIndicesPerInstance, numRects);
+        void* vertices = helper.vertices();
         if (!vertices || !indexBuffer) {
             SkDebugf("Could not allocate vertices\n");
             return;
@@ -144,22 +144,22 @@
             verts += numRectsInRegion * kVertsPerInstance * kVertexStride;
         }
         auto pipe = fHelper.makePipeline(target);
-        helper.recordDraw(target, gp.get(), pipe.fPipeline, pipe.fFixedDynamicState);
+        helper.recordDraw(target, std::move(gp), pipe.fPipeline, pipe.fFixedDynamicState);
     }
 
-    bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
+    CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
         RegionOp* that = t->cast<RegionOp>();
         if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {
-            return false;
+            return CombineResult::kCannotCombine;
         }
 
         if (fViewMatrix != that->fViewMatrix) {
-            return false;
+            return CombineResult::kCannotCombine;
         }
 
         fRegions.push_back_n(that->fRegions.count(), that->fRegions.begin());
         this->joinBounds(*that);
-        return true;
+        return CombineResult::kMerged;
     }
 
     struct RegionInfo {