Move GrDrawTarget::clear logic into GrDrawContext

src/gpu/batches/GrClearBatch.h

Index: src/gpu/batches/GrClearBatch.h
diff --git a/src/gpu/batches/GrClearBatch.h b/src/gpu/batches/GrClearBatch.h
index 9a653a3962ca386efdd6c3d55033fc41fbccd029..40ee4cb3b26260de1241cfe69a92863f5922911e 100644
--- a/src/gpu/batches/GrClearBatch.h
+++ b/src/gpu/batches/GrClearBatch.h
@@ -71,46 +71,4 @@ private:
     typedef GrBatch INHERITED;
 };
 
-class GrClearStencilClipBatch final : public GrBatch {
-public:
-    DEFINE_BATCH_CLASS_ID
-
-    GrClearStencilClipBatch(const SkIRect& rect, bool insideClip, GrRenderTarget* rt)
-        : INHERITED(ClassID())
-        , fRect(rect)
-        , fInsideClip(insideClip)
-        , fRenderTarget(rt) {
-        this->setBounds(SkRect::Make(rect), HasAABloat::kNo, IsZeroArea::kNo);
-    }
-
-    const char* name() const override { return "ClearStencilClip"; }
-
-    uint32_t renderTargetUniqueID() const override { return fRenderTarget.get()->getUniqueID(); }
-    GrRenderTarget* renderTarget() const override { return fRenderTarget.get(); }
-
-    SkString dumpInfo() const override {
-        SkString string;
-        string.printf("Rect [L: %d, T: %d, R: %d, B: %d], IC: %d, RT: 0x%p",
-                      fRect.fLeft, fRect.fTop, fRect.fRight, fRect.fBottom, fInsideClip,
-                      fRenderTarget.get());
-        string.append(INHERITED::dumpInfo());
-        return string;
-    }
-
-private:
-    bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
-
-    void onPrepare(GrBatchFlushState*) override {}
-
-    void onDraw(GrBatchFlushState* state) override {
-        state->commandBuffer()->clearStencilClip(fRect, fInsideClip, fRenderTarget.get());
-    }
-
-    SkIRect                                                 fRect;
-    bool                                                    fInsideClip;
-    GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
-
-    typedef GrBatch INHERITED;
-};
-
 #endif