Rename GrBatchAtlas -> GrDrawOpAtlas.

Change-Id: I776f37e42dcab8b16535c48df9c405b1f211f6c9
Reviewed-on: https://skia-review.googlesource.com/6165
Commit-Queue: Brian Salomon <brian@thesalomons.net>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 2e40dd3..73fb4d6 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -73,8 +73,6 @@
   "$_src/gpu/GrAuditTrail.cpp",
   "$_src/gpu/GrAutoLocaleSetter.h",
   "$_src/gpu/GrAllocator.h",
-  "$_src/gpu/GrDrawOpAtlas.cpp",
-  "$_src/gpu/GrDrawOpAtlas.h",
   "$_src/gpu/GrBatchTest.cpp",
   "$_src/gpu/GrBatchTest.h",
   "$_src/gpu/GrBitmapTextureMaker.cpp",
@@ -96,6 +94,8 @@
   "$_src/gpu/GrDefaultGeoProcFactory.h",
   "$_src/gpu/GrDrawingManager.cpp",
   "$_src/gpu/GrDrawingManager.h",
+  "$_src/gpu/GrDrawOpAtlas.cpp",
+  "$_src/gpu/GrDrawOpAtlas.h",
   "$_src/gpu/GrFixedClip.cpp",
   "$_src/gpu/GrFixedClip.h",
   "$_src/gpu/GrFragmentProcessor.cpp",