DM: add --pipe

internal_links is failing across all three versions.  One of the rects doesn't draw.

BUG=
R=epoger@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/47773002

git-svn-id: http://skia.googlecode.com/svn/trunk@11985 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/dm/DMCpuTask.cpp b/dm/DMCpuTask.cpp
index f6edf23..7e6f909 100644
--- a/dm/DMCpuTask.cpp
+++ b/dm/DMCpuTask.cpp
@@ -1,4 +1,5 @@
 #include "DMCpuTask.h"
+#include "DMPipeTask.h"
 #include "DMReplayTask.h"
 #include "DMSerializeTask.h"
 #include "DMUtil.h"
@@ -33,6 +34,10 @@
         this->fail();
     }
 
+    this->spawnChild(SkNEW_ARGS(PipeTask, (*this, fGMFactory(NULL), bitmap, false, false)));
+    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)));
     this->spawnChild(SkNEW_ARGS(SerializeTask, (*this, fGMFactory(NULL), bitmap)));
     this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));