Mark GrMemoryPool methods as static.

R=jvanverth@google.com

Author: bsalomon@google.com

Review URL: https://chromiumcodereview.appspot.com/21553002

git-svn-id: http://skia.googlecode.com/svn/trunk@10481 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrMemoryPool.h b/src/gpu/GrMemoryPool.h
index d327df4..b33ee82 100644
--- a/src/gpu/GrMemoryPool.h
+++ b/src/gpu/GrMemoryPool.h
@@ -46,9 +46,9 @@
 private:
     struct BlockHeader;
 
-    BlockHeader* CreateBlock(size_t size);
+    static BlockHeader* CreateBlock(size_t size);
 
-    void DeleteBlock(BlockHeader* block);
+    static void DeleteBlock(BlockHeader* block);
 
     void validate();