sk_tool_utils -> ToolUtils, and git clang-format

sk_tool_utils doesn't really fit the naming convention
the rest of code under tools/ tends to use.

Change-Id: I45326a174101c6eb4b6149e9c742f658f2fd23b1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/202313
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/gm/srgb.cpp b/gm/srgb.cpp
index 21571c5..fb6fc2c 100644
--- a/gm/srgb.cpp
+++ b/gm/srgb.cpp
@@ -5,12 +5,12 @@
  * found in the LICENSE file.
  */
 
-#include "gm.h"
-#include "sk_tool_utils.h"
-#include "SkCanvas.h"
-#include "SkImage.h"
 #include "Resources.h"
+#include "SkCanvas.h"
 #include "SkColorFilter.h"
+#include "SkImage.h"
+#include "ToolUtils.h"
+#include "gm.h"
 
 DEF_SIMPLE_GM(srgb_colorfilter, canvas, 512, 256*3) {
     auto img = GetResourceAsImage("images/mandrill_256.png");