Move SkTemplates.h to private.

SkTemplates.h contains a number of Skia specific utilities which are
not designed for external use. In addition to reducing the external
support burden, this will allow Skia to freely refactor this file.

Review URL: https://codereview.chromium.org/1272293004
diff --git a/src/image/SkImage_Base.h b/src/image/SkImage_Base.h
index 37dcb40..38f9906 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -11,6 +11,8 @@
 #include "SkImage.h"
 #include "SkSurface.h"
 
+#include <new>
+
 enum {
     kNeedNewImageUniqueID = 0
 };