DM: add --rtree.

dm/DMCpuTask.cpp

Index: dm/DMCpuTask.cpp
diff --git a/dm/DMCpuTask.cpp b/dm/DMCpuTask.cpp
index 7e6f909ff3a44c25062c97780aea11d3871f1f9c..ee461076321632a9bdc8635d6e0b79f4389bdeea 100644
--- a/dm/DMCpuTask.cpp
+++ b/dm/DMCpuTask.cpp
@@ -5,6 +5,8 @@
 #include "DMUtil.h"
 #include "DMWriteTask.h"
 
+#include "SkPicture.h"
+
 namespace DM {
 
 CpuTask::CpuTask(const char* name,
@@ -38,7 +40,10 @@ void CpuTask::draw() {
     this->spawnChild(SkNEW_ARGS(PipeTask, (*this, fGMFactory(NULL), bitmap, true, false)));
     this->spawnChild(SkNEW_ARGS(PipeTask, (*this, fGMFactory(NULL), bitmap, true, true)));
 
-    this->spawnChild(SkNEW_ARGS(ReplayTask, (*this, fGMFactory(NULL), bitmap)));
+    const uint32_t kReplay = 0, kRTree = SkPicture::kOptimizeForClippedPlayback_RecordingFlag;
+    this->spawnChild(SkNEW_ARGS(ReplayTask, (*this, fGMFactory(NULL), bitmap, kReplay)));
+    this->spawnChild(SkNEW_ARGS(ReplayTask, (*this, fGMFactory(NULL), bitmap, kRTree)));
+
     this->spawnChild(SkNEW_ARGS(SerializeTask, (*this, fGMFactory(NULL), bitmap)));
     this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
 }