Install a hook to swap between SkPicture backends with a single define.

dm/DMSKPTask.cpp

 #include "DMSKPTask.h"
 #include "DMUtil.h"
 #include "DMWriteTask.h"
 
 #include "SkCommandLineFlags.h"
 #include "SkPictureRecorder.h"
 
-DEFINE_bool(skr, true, "Test that SKPs draw the same when re-recorded with SkRecord backend.");
 DEFINE_int32(skpMaxWidth,  1000, "Max SKPTask viewport width.");
 DEFINE_int32(skpMaxHeight, 1000, "Max SKPTask viewport height.");
 
 namespace DM {
 
-// Test that an SkPicture plays back the same when re-recorded into an
-// SkPicture backed by SkRecord.
-class SkrComparisonTask : public CpuTask {
-public:
-    SkrComparisonTask(const Task& parent, const SkPicture* picture, SkBitmap reference)
-        : CpuTask(parent)
-        , fPicture(SkRef(picture))
-        , fReference(reference)
-        , fName(UnderJoin(parent.name().c_str(), "skr")) {}
-
-    virtual bool shouldSkip() const SK_OVERRIDE { return !FLAGS_skr; }
-    virtual SkString name() const SK_OVERRIDE { return fName; }
-
-    virtual void draw() SK_OVERRIDE {
-        SkPictureRecorder recorder;
-        fPicture->draw(recorder.EXPERIMENTAL_beginRecording(fPicture->width(), fPicture->height()));
-        SkAutoTDelete<const SkPicture> skrPicture(recorder.endRecording());
-
-        SkBitmap bitmap;
-        AllocatePixels(kN32_SkColorType, fReference.width(), fReference.height(), &bitmap);
-        DrawPicture(*skrPicture, &bitmap);
-
-        if (!BitmapsEqual(fReference, bitmap)) {
-            this->fail();
-            this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
-        }
-    }
-
-private:
-    SkAutoTUnref<const SkPicture> fPicture;
-    const SkBitmap fReference;
-    const SkString fName;
-};
-
-
 SKPTask::SKPTask(Reporter* r, TaskRunner* tr, const SkPicture* pic, SkString filename)
     : CpuTask(r, tr), fPicture(SkRef(pic)), fName(FileToTaskName(filename)) {}
 
 void SKPTask::draw() {
     const int width  = SkTMin(fPicture->width(),  FLAGS_skpMaxWidth),
               height = SkTMin(fPicture->height(), FLAGS_skpMaxHeight);
     SkBitmap bitmap;
     AllocatePixels(kN32_SkColorType, width, height, &bitmap);
     DrawPicture(*fPicture, &bitmap);
 
     this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
-    this->spawnChild(SkNEW_ARGS(SkrComparisonTask, (*this, fPicture.get(), bitmap)));
 }
 
 }  // namespace DM