Revert of Consolidate GPU buffer implementations

src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp

Index: src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp
diff --git a/src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp b/src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp
index 1cd8daf881ede324dc774803592d489b8e657782..120ecc76ee6901802ee7b5c33178e760fb7eb6a9 100644
--- a/src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp
+++ b/src/gpu/batches/GrAALinearizingConvexPathRenderer.cpp
@@ -164,7 +164,7 @@
         if (vertexCount == 0 || indexCount == 0) {
             return;
         }
-        const GrBuffer* vertexBuffer;
+        const GrVertexBuffer* vertexBuffer;
         GrMesh mesh;
         int firstVertex;
         void* verts = target->makeVertexSpace(vertexStride, vertexCount, &vertexBuffer,
@@ -175,7 +175,7 @@
         }
         memcpy(verts, vertices, vertexCount * vertexStride);
 
-        const GrBuffer* indexBuffer;
+        const GrIndexBuffer* indexBuffer;
         int firstIndex;
         uint16_t* idxs = target->makeIndexSpace(indexCount, &indexBuffer, &firstIndex);
         if (!idxs) {