Disable preemptive batch preparation

src/gpu/GrBatchFlushState.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrBatchBuffer_DEFINED
 #define GrBatchBuffer_DEFINED
 
@@ skipping 26 matching lines @@
         return fGpu->writePixels(texture, left, top, width, height, config, buffer, rowBytes);
     }
 
 private:
     GrGpu* fGpu;
 };
 
 /** Tracks the state across all the GrBatches in a GrDrawTarget flush. */
 class GrBatchFlushState {
 public:
-    GrBatchFlushState(GrGpu*, GrResourceProvider*, GrBatchToken lastFlushedToken);
+    GrBatchFlushState(GrGpu*, GrResourceProvider*);
 
     ~GrBatchFlushState() { this->reset(); }
 
     void advanceToken() { ++fCurrentToken; }
 
     void advanceLastFlushedToken() { ++fLastFlushedToken; }
 
     /** Inserts an upload to be executred after all batches in the flush prepared their draws
         but before the draws are executed to the backend 3D API. */
     void addASAPUpload(GrBatchUploader* upload) {
@@ skipping 127 matching lines @@
     void putBackVertices(int vertices, size_t vertexStride) {
         this->state()->putBackVertexSpace(vertices * vertexStride);
     }
 
 private:
     GrVertexBatch* vertexBatch() { return static_cast<GrVertexBatch*>(this->batch()); }
     typedef GrDrawBatch::Target INHERITED;
 };
 
 #endif