Added GrTextureStripAtlas object.
Review URL: https://codereview.appspot.com/6457099

git-svn-id: http://skia.googlecode.com/svn/trunk@5070 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index 8cefa77..57f0aeb 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -840,6 +840,7 @@
     // internal class would have only be callable in src/gpu. The facade would
     // only have to functions necessary for clients.
     friend class GrAtlas;
+    friend class GrTextureStripAtlas;
 
     // Needed so GrTexture's returnToCache helper function can call
     // addExistingTextureToCache