Add Batch logging

src/gpu/GrBatch.h

Index: src/gpu/GrBatch.h
diff --git a/src/gpu/GrBatch.h b/src/gpu/GrBatch.h
index 51c556e737a0b6a9a15f23f2db233b86a19e2138..c0a6ab4594aec39690803f4c134d623b7c9eca5f 100644
--- a/src/gpu/GrBatch.h
+++ b/src/gpu/GrBatch.h
@@ -36,6 +36,12 @@ struct GrInitInvariantOutput;
  * the draw, ie whether or not the GrBatch is allowed to tweak alpha for coverage, then this
  * information will be communicated to the GrBatch prior to geometry generation.
  */
+#define BATCH_SPEW

[bsalomon, 2015/08/06 17:54:12]

Since it's in a header, maybe GR_BATCH_SPEW?

Also we usually define macros to 0 to disable or 1 to enable. It allows you type
compound checks that are a mix of runtime and compile time without a lot if
#idef/#else:

if (GR_BATCH_SPEW && this->isAmazing()) {
   this->printSomeCoolStuff();
}

+#ifdef BATCH_SPEW
+    #define GrBATCH_INFO(...) SkDebugf(__VA_ARGS__)
+#else
+    #define GrBATCH_INFO(...)
+#endif
 
 class GrBatch : public GrNonAtomicRef {
 public: