Increase the amount of debug information printed out by batches

Untangling MDB bugs requires more information. In particular the render targets.

BUG=skia:4094
TBR=bsalomon@google.com

Review URL: https://codereview.chromium.org/1443763002
diff --git a/src/gpu/effects/GrTextureDomain.h b/src/gpu/effects/GrTextureDomain.h
index aa1db00..cd06304 100644
--- a/src/gpu/effects/GrTextureDomain.h
+++ b/src/gpu/effects/GrTextureDomain.h
@@ -174,6 +174,15 @@
 
     const char* name() const override { return "TextureDomain"; }
 
+    SkString dumpInfo() const override {
+        SkString str;
+        str.appendf("Domain: [L: %.2f, T: %.2f, R: %.2f, B: %.2f] ", 
+                    fTextureDomain.domain().fLeft, fTextureDomain.domain().fTop,
+                    fTextureDomain.domain().fRight, fTextureDomain.domain().fBottom);
+        str.append(INHERITED::dumpInfo());
+        return str;
+    }
+
     const GrTextureDomain& textureDomain() const { return fTextureDomain; }
 
 protected: