Turn SkCanvasStateUtils into a class with static functions.

include/utils/SkCanvasStateUtils.h

Index: include/utils/SkCanvasStateUtils.h
diff --git a/include/utils/SkCanvasStateUtils.h b/include/utils/SkCanvasStateUtils.h
index 6ea7b10307439ab285d2a97e1a13a51dbf77c697..3071c7547ce7e9a9a9689c67b131248d2cb09333 100644
--- a/include/utils/SkCanvasStateUtils.h
+++ b/include/utils/SkCanvasStateUtils.h
@@ -27,7 +27,8 @@ class SkCanvasState;
  * ReleaseCanvasState(...)      |||
  *
  */
-namespace SkCanvasStateUtils {
+class SK_API SkCanvasStateUtils {
+public:
     /**
      * Captures the current state of the canvas into an opaque ptr that is safe
      * to pass to a different instance of Skia (which may be the same version,
@@ -47,7 +48,7 @@ namespace SkCanvasStateUtils {
      *         to reconstruct the canvas. The caller is responsible for calling
      *         ReleaseCanvasState to free the memory associated with this state.
      */
-    SK_API SkCanvasState* CaptureCanvasState(SkCanvas* canvas);
+    static SkCanvasState* CaptureCanvasState(SkCanvas* canvas);
 
     /**
      * Create a new SkCanvas from the captured state of another SkCanvas. The
@@ -61,7 +62,7 @@ namespace SkCanvasStateUtils {
      *         identical to the captured canvas. The caller is responsible for
      *         calling unref on the SkCanvas.
      */
-    SK_API SkCanvas* CreateFromCanvasState(const SkCanvasState* state);
+    static SkCanvas* CreateFromCanvasState(const SkCanvasState* state);
 
     /**
      * Free the memory associated with the captured canvas state.  The state
@@ -71,7 +72,7 @@ namespace SkCanvasStateUtils {
      *
      * @param state The captured state you wish to dispose of.
      */
-    SK_API void ReleaseCanvasState(SkCanvasState* state);
+    static void ReleaseCanvasState(SkCanvasState* state);
 };
 
 #endif