Dump batch bounds and scissor rect

src/gpu/batches/GrBatch.h

Index: src/gpu/batches/GrBatch.h
diff --git a/src/gpu/batches/GrBatch.h b/src/gpu/batches/GrBatch.h
index b26cdde73c98603d0b1fbe93dcc34642ae87b558..b0906ab690dbc51b7fb9409f35a9d590d693e699 100644
--- a/src/gpu/batches/GrBatch.h
+++ b/src/gpu/batches/GrBatch.h
@@ -118,7 +118,12 @@ public:
     virtual uint32_t renderTargetUniqueID() const = 0;
 
     /** Used for spewing information about batches when debugging. */
-    virtual SkString dumpInfo() const = 0;
+    virtual SkString dumpInfo() const {
+        SkString string;
+        string.appendf("BatchBounds: [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n",
+                       fBounds.fLeft, fBounds.fTop, fBounds.fRight, fBounds.fBottom);
+        return string;
+    }
 
     /** Can remove this when multi-draw-buffer lands */
     virtual GrRenderTarget* renderTarget() const = 0;