Move mojo/public/c/gpu/* to mojo/public/c/include.

mojo/public/c/include/MGL/mgl_types.h

Index: mojo/public/c/include/MGL/mgl_types.h
diff --git a/mojo/public/c/gpu/MGL/mgl_types.h b/mojo/public/c/include/MGL/mgl_types.h
similarity index 73%
rename from mojo/public/c/gpu/MGL/mgl_types.h
rename to mojo/public/c/include/MGL/mgl_types.h
index b28aee610b9a4b061bb5e2e7887765523ec92f03..a38e25475349828b331aa0d9f9c41e1db3101de6 100644
--- a/mojo/public/c/gpu/MGL/mgl_types.h
+++ b/mojo/public/c/include/MGL/mgl_types.h
@@ -4,12 +4,12 @@
 
 // Note: This header should be compilable as C.
 
-#ifndef MOJO_PUBLIC_C_GPU_MGL_TYPES_H_
-#define MOJO_PUBLIC_C_GPU_MGL_TYPES_H_
+#ifndef MOJO_PUBLIC_C_INCLUDE_MGL_TYPES_H_
+#define MOJO_PUBLIC_C_INCLUDE_MGL_TYPES_H_
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include <mojo/macros.h>
+
+MOJO_BEGIN_EXTERN_C
 
 typedef struct MGLContextPrivate* MGLContext;
 typedef void (*MGLContextLostCallback)(void* closure);
@@ -19,8 +19,6 @@ typedef void (*MGLSignalSyncPointCallback)(void* closure);
 // type and calling convention before use.
 typedef void (*MGLMustCastToProperFunctionPointerType)(void);
 
-#ifdef __cplusplus
-}  // extern "C"
-#endif
+MOJO_END_EXTERN_C
 
-#endif  // MOJO_PUBLIC_C_GPU_MGL_TYPES_H_
+#endif  // MOJO_PUBLIC_C_INCLUDE_MGL_TYPES_H_