Support serialization in SkRecord-backed SkPictures.

dm/DMReplayTask.cpp

 #include "DMReplayTask.h"
 #include "DMWriteTask.h"
 #include "DMUtil.h"
 
 #include "SkBBHFactory.h"
 #include "SkCommandLineFlags.h"
 #include "SkPicture.h"
 
 DEFINE_bool(replay, true, "If true, run picture replay tests.");
 DEFINE_bool(rtree,  true, "If true, run picture replay tests with an rtree.");
+DEFINE_bool(skr,    true, "If true, run picture replay tests with SkRecord backend.");
+
+static const char* kSuffixes[] = { "replay", "rtree", "skr" };
+static const bool* kEnabled[]  = { &FLAGS_replay, &FLAGS_rtree, &FLAGS_skr };
 
 namespace DM {
 
 ReplayTask::ReplayTask(const Task& parent,
                        skiagm::GM* gm,
                        SkBitmap reference,
                        Mode mode)
     : CpuTask(parent)
-    , fUseRTree(mode == kRTree_Mode)
-    , fName(UnderJoin(parent.name().c_str(), fUseRTree ? "rtree" : "replay"))
+    , fMode(mode)
+    , fName(UnderJoin(parent.name().c_str(), kSuffixes[mode]))
     , fGM(gm)
     , fReference(reference)
     {}
 
 void ReplayTask::draw() {
     SkAutoTDelete<SkBBHFactory> factory;
-    if (fUseRTree) {
+    if (kRTree_Mode == fMode) {
         factory.reset(SkNEW(SkRTreeFactory));
     }
-    SkAutoTUnref<SkPicture> recorded(RecordPicture(fGM.get(), 0, factory.get()));
+    SkAutoTUnref<SkPicture> recorded(
+            RecordPicture(fGM.get(), factory.get(), kSkRecord_Mode == fMode));
 
     SkBitmap bitmap;
     AllocatePixels(fReference, &bitmap);
-    DrawPicture(recorded, &bitmap);
+    DrawPicture(*recorded, &bitmap);
     if (!BitmapsEqual(bitmap, fReference)) {
         this->fail();
         this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
     }
 }
 
 bool ReplayTask::shouldSkip() const {
     if (fGM->getFlags() & skiagm::GM::kSkipPicture_Flag) {
         return true;
     }
-
-    if (FLAGS_rtree && fUseRTree) {
-        return false;
-    }
-    if (FLAGS_replay && !fUseRTree) {
-        return false;
-    }
-    return true;
+    return !*kEnabled[fMode];
 }
 
 }  // namespace DM