Change Atlas recycling to track current flush count and recycle if Atlas not used in current flush.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 20c633dc67878d09bc9cff88e82cb04a2f72da1c..a315909e1ce56bdad2c5d4a876558e28764be102 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -104,6 +104,7 @@ GrContext::GrContext() {
     fOvalRenderer = NULL;
     fViewMatrix.reset();
     fMaxTextureSizeOverride = 1 << 20;
+    fFlushCount = 0;
 }
 
 bool GrContext::init(GrBackend backend, GrBackendContext backendContext) {
@@ -1150,6 +1151,7 @@ void GrContext::flush(int flagsBitfield) {
     } else {
         fDrawBuffer->flush();
     }
+    ++fFlushCount;
 }
 
 bool GrContext::writeTexturePixels(GrTexture* texture,