Improve batching of drawBitmap* calls

include/gpu/GrEffectStage.h

Index: include/gpu/GrEffectStage.h
===================================================================
--- include/gpu/GrEffectStage.h	(revision 9486)
+++ include/gpu/GrEffectStage.h	(working copy)
@@ -166,7 +166,7 @@
             SkSafeUnref(oldEffectRef);
         }
 
-        bool isEqual(const GrEffectStage& stage) const {
+        bool isEqual(const GrEffectStage& stage, bool ignoreCoordChange) const {
             if (NULL == stage.fEffectRef) {
                 return NULL == fEffect;
             } else if (NULL == fEffect) {
@@ -182,6 +182,12 @@
                 return false;
             }
 
+            if (ignoreCoordChange) {
+                // ignore the coordinate change matrix since there are
+                // explicit uv coordinates
+                return true;
+            }
+
             if (fCoordChangeMatrixSet != stage.fCoordChangeMatrixSet) {
                 return false;
             }