SkResourceCache.h shouldn't include itself.

The include guards make this not bad, but it seems strange and iwyu
complains about it.

Change-Id: I4e40d290b4c7208dddf82fdd1b107780c239d8fc
Reviewed-on: https://skia-review.googlesource.com/113423
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index 6869e4e..07f04a8 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -11,7 +11,6 @@
 #include "GrGpuResource.h"
 #include "GrGpuResourceCacheAccess.h"
 #include "GrGpuResourcePriv.h"
-#include "GrResourceCache.h"
 #include "GrResourceKey.h"
 #include "SkMessageBus.h"
 #include "SkRefCnt.h"