rename SkMipMap to SkMipmap

Change-Id: I1fa8a0482a717847236a30b4851061f4074b7755
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302644
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index 1dd5902..9a97bd8 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -25,7 +25,7 @@
 #include "src/core/SkImagePriv.h"
 #include "src/core/SkMaskFilterBase.h"
 #include "src/core/SkMessageBus.h"
-#include "src/core/SkMipMap.h"
+#include "src/core/SkMipmap.h"
 #include "src/core/SkPaintPriv.h"
 #include "src/core/SkResourceCache.h"
 #include "src/core/SkTraceEvent.h"