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

mojo/public/platform/native/mgl_echo_thunks.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ECHO_THUNKS_H_
 #define MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ECHO_THUNKS_H_
 
+#include <MGL/mgl_echo.h>
 #include <stddef.h>
 
-#include "mojo/public/c/gpu/MGL/mgl_echo.h"
-
 // Structure used to bind the MGL echo interface DSO to those of the embedder.
 //
 // This is the ABI between the embedder and the DSO. It can only have new
 // functions added to the end. No other changes are supported.
 #pragma pack(push, 8)
 struct MGLEchoThunks {
   size_t size;  // Should be set to sizeof(MGLEchoThunks).
 
   void (*MGLEcho)(MGLEchoCallback callback, void* lost_callback_closure);
 };
@@ skipping 16 matching lines @@
 // a DSO linked with mojo_system. For example:
 // MojoSetMGLEchoThunksFn mojo_set_gles2_thunks_fn =
 //     reinterpret_cast<MojoSetMGLEchoThunksFn>(
 //         app_library.GetFunctionPointer("MojoSetMGLEchoThunks"));
 // The expected size of |mgl_thunks| is returned.
 // The contents of |mgl_thunks| are copied.
 typedef size_t (*MojoSetMGLEchoThunksFn)(
     const struct MGLEchoThunks* mgl_echo_thunks);
 
 #endif  // MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ECHO_THUNKS_H_