Dependencies are now added between the drawTargets in GrPipeline

src/gpu/GrDrawingManager.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 "GrAtlasTextContext.h"
 #include "GrDrawContext.h"
 #include "GrDrawingManager.h"
 #include "GrDrawTarget.h"
 #include "GrResourceProvider.h"
 #include "GrSoftwarePathRenderer.h"
 #include "GrStencilAndCoverTextContext.h"
 #include "SkTTopoSort.h"
 
+//#define ENABLE_MDB 1
+
 void GrDrawingManager::cleanup() {
     for (int i = 0; i < fDrawTargets.count(); ++i) {
         fDrawTargets[i]->unref();
     }
 
     fDrawTargets.reset();
 
     delete fNVPRTextContext;
     fNVPRTextContext = nullptr;
 
@@ skipping 81 matching lines @@
 
 #ifndef ENABLE_MDB
     // When MDB is disabled we always just return the single drawTarget
     if (fDrawTargets.count()) {
         SkASSERT(fDrawTargets.count() == 1);
         // DrawingManager gets the creation ref - this ref is for the caller
         return SkRef(fDrawTargets[0]);
     }
 #endif
 
-    GrDrawTarget* dt = new GrDrawTarget(fContext->getGpu(), fContext->resourceProvider(),
+    GrDrawTarget* dt = new GrDrawTarget(rt, fContext->getGpu(), fContext->resourceProvider(),
                                         fOptions);
 
     *fDrawTargets.append() = dt;
 
     // DrawingManager gets the creation ref - this ref is for the caller 
     return SkRef(dt);
 }
 
 /*
  * This method finds a path renderer that can draw the specified path on
@@ skipping 22 matching lines @@
 }
 
 GrDrawContext* GrDrawingManager::drawContext(GrRenderTarget* rt,
                                              const SkSurfaceProps* surfaceProps) {
     if (this->abandoned()) {
         return nullptr;
     }
 
     return new GrDrawContext(this, rt, surfaceProps);
 }