Introduce GrBatch subclasses GrDrawBatch and GrVertexBatch to prepare for non-drawing batches

src/gpu/GrReorderCommandBuilder.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrReorderCommandBuilder.h"
 
 template <class Left, class Right>
 static bool intersect(const Left& a, const Right& b) {
     SkASSERT(a.fLeft <= a.fRight && a.fTop <= a.fBottom &&
              b.fLeft <= b.fRight && b.fTop <= b.fBottom);
     return a.fLeft < b.fRight && b.fLeft < a.fRight &&
            a.fTop < b.fBottom && b.fTop < a.fBottom;
 }
 
-GrTargetCommands::Cmd* GrReorderCommandBuilder::recordDrawBatch(GrBatch* batch,
+GrTargetCommands::Cmd* GrReorderCommandBuilder::recordDrawBatch(GrDrawBatch* batch,
                                                                 const GrCaps& caps) {
     // Check if there is a Batch Draw we can batch with by linearly searching back until we either
     // 1) check every draw
     // 2) intersect with something
     // 3) find a 'blocker'
     // Experimentally we have found that most batching occurs within the first 10 comparisons.
     static const int kMaxLookback = 10;
     int i = 0;
 
     GrRenderTarget* rt = batch->pipeline()->getRenderTarget();
@@ skipping 71 matching lines @@
 #endif
     }
 #if GR_BATCH_SPEW
     else {
         GrBATCH_INFO("\t\tBreaking because empty command buffer\n");
     }
 #endif
 
     return GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), DrawBatch, (batch, this->batchTarget()));
 }