Make GrTextureStripAtlas flush pending IO on newly acquired texture

include/gpu/GrContext.h

Index: include/gpu/GrContext.h
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index a34a43733a8fc18040e9f15424458eb954598519..41292fe5cde94558f0f5f480eb68a64ec0204c7c 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -307,6 +307,12 @@ public:
     void flushSurfaceWrites(GrSurface* surface);
 
     /**
+     * After this returns any pending reads or writes to the surface will have been issued to the
+     * backend 3D API.
+     */
+    void flushSurfaceIO(GrSurface* surface);
+
+    /**
      * Finalizes all pending reads and writes to the surface and also performs an MSAA resolve
      * if necessary.
      *