Initial CL to create Reorder command builder behind a flag

src/gpu/GrCommandBuilder.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 "GrCommandBuilder.h"
 
+#include "GrInOrderCommandBuilder.h"
+#include "GrReorderCommandBuilder.h"
+
+GrCommandBuilder* GrCommandBuilder::Create(GrGpu* gpu, bool reorder) {
+    if (reorder) {
+        return SkNEW_ARGS(GrReorderCommandBuilder, (gpu));
+    } else {
+        return SkNEW_ARGS(GrInOrderCommandBuilder, (gpu));
+    }
+}
+
 GrTargetCommands::Cmd* GrCommandBuilder::recordClear(const SkIRect* rect,
                                                      GrColor color,
                                                      bool canIgnoreRect,
                                                      GrRenderTarget* renderTarget) {
     SkASSERT(renderTarget);
 
     SkIRect r;
     if (NULL == rect) {
         // We could do something smart and remove previous draws and clears to
         // the current render target. If we get that smart we have to make sure
@@ skipping 48 matching lines @@
 
     GrXferBarrierType barrierType;
     if (!xp.willNeedXferBarrier(rt, caps, &barrierType)) {
         return NULL;
     }
 
     XferBarrier* xb = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), XferBarrier, ());
     xb->fBarrierType = barrierType;
     return xb;
 }