Add debug option to clip each GrBatch to its device bounds

src/gpu/GrDrawTarget.h

Index: src/gpu/GrDrawTarget.h
diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrDrawTarget.h
index cf3137fe7c68fc44c6a3fd9fe2b782ec098eb700..cb214c97a0fe99b2f7656e18c2535e654ffec7fa 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrDrawTarget.h
@@ -43,9 +43,13 @@ class GrPathRangeDraw;
 
 class GrDrawTarget final : public SkRefCnt {
 public:
-    // The context may not be fully constructed and should not be used during GrDrawTarget
-    // construction.
-    GrDrawTarget(GrRenderTarget* rt, GrGpu* gpu, GrResourceProvider*);
+    /** Options for GrDrawTarget behavior. */
+    struct Options {
+        Options () : fClipBatchToBounds(false) {}
+        bool fClipBatchToBounds;
+    };
+
+    GrDrawTarget(GrRenderTarget*, GrGpu*, GrResourceProvider*, const Options&);
 
     ~GrDrawTarget() override;