Isolate GrBufferAllocPools inside GrBatchTarget

src/gpu/GrTargetCommands.cpp

Index: src/gpu/GrTargetCommands.cpp
diff --git a/src/gpu/GrTargetCommands.cpp b/src/gpu/GrTargetCommands.cpp
index bf1a7af2812227e69314945e497db0457f687a5c..7e57c0329190a328782050d7355d480118f66455 100644
--- a/src/gpu/GrTargetCommands.cpp
+++ b/src/gpu/GrTargetCommands.cpp
@@ -11,6 +11,7 @@
 
 void GrTargetCommands::reset() {
     fCmdBuffer.reset();
+    fBatchTarget.reset();
 }
 
 void GrTargetCommands::flush(GrInOrderDrawBuffer* iodb) {
@@ -31,8 +32,6 @@ void GrTargetCommands::flush(GrInOrderDrawBuffer* iodb) {
         }
     }
 
-    iodb->getVertexAllocPool()->unmap();
-    iodb->getIndexAllocPool()->unmap();
     fBatchTarget.preFlush();
 
     CmdBuffer::Iter iter(fCmdBuffer);