Delete unused file: base/android/linker/android_dlext.h

Change-Id: I7ac0ec87a2f27aba3cf2b93f8cf890d179369055
Reviewed-on: https://chromium-review.googlesource.com/1023911Reviewed-by: Egor Pasko <pasko@chromium.org>
Commit-Queue: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552749}

base/android/linker/BUILD.gn

@@ -8,7 +8,6 @@ assert(is_android)
 
 shared_library("chromium_android_linker") {
   sources = [
-    "android_dlext.h",
     "legacy_linker_jni.cc",
     "legacy_linker_jni.h",
     "linker_jni.cc",

base/android/linker/android_dlext.h

-// Copyright 2015 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.
-
-// Definitions for android_dlopen_ext().
-//
-// This function was added for Android L-MR1 and made available in android-21
-// but we currently build Chromium with android-16. Placing the declarations
-// we need here allows code that uses android_dlopen_ext() to build with
-// android-16. At runtime we check the target's SDK_INT to ensure that we
-// are on a system new enough to offer this function, and also only access
-// it with dlsym so that the runtime linker on pre-Android L-MR1 targets will
-// not complain about a missing symbol when loading our library.
-//
-// Details below taken from:
-//   third_party/android_ndk/platforms/android-21
-//       /arch-arm/usr/include/android/dlext.h
-//
-// Although taken specifically from arch-arm, there are no architecture-
-// specific elements in dlext.h. All android-21/arch-* directories contain
-// identical copies of dlext.h.
-
-#ifndef BASE_ANDROID_LINKER_ANDROID_DLEXT_H_
-#define BASE_ANDROID_LINKER_ANDROID_DLEXT_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-/* bitfield definitions for android_dlextinfo.flags */
-enum {
-  /* When set, the reserved_addr and reserved_size fields must point to an
-   * already-reserved region of address space which will be used to load the
-   * library if it fits. If the reserved region is not large enough, the load
-   * will fail.
-   */
-  ANDROID_DLEXT_RESERVED_ADDRESS      = 0x1,
-
-  /* As DLEXT_RESERVED_ADDRESS, but if the reserved region is not large enough,
-   * the linker will choose an available address instead.
-   */
-  ANDROID_DLEXT_RESERVED_ADDRESS_HINT = 0x2,
-
-  /* When set, write the GNU RELRO section of the mapped library to relro_fd
-   * after relocation has been performed, to allow it to be reused by another
-   * process loading the same library at the same address. This implies
-   * ANDROID_DLEXT_USE_RELRO.
-   */
-  ANDROID_DLEXT_WRITE_RELRO           = 0x4,
-
-  /* When set, compare the GNU RELRO section of the mapped library to relro_fd
-   * after relocation has been performed, and replace any relocated pages that
-   * are identical with a version mapped from the file.
-   */
-  ANDROID_DLEXT_USE_RELRO             = 0x8,
-
-  /* Instruct dlopen to use library_fd instead of opening file by name.
-   * The filename parameter is still used to identify the library.
-   */
-  ANDROID_DLEXT_USE_LIBRARY_FD        = 0x10,
-
-  /* Mask of valid bits */
-  ANDROID_DLEXT_VALID_FLAG_BITS       = ANDROID_DLEXT_RESERVED_ADDRESS |
-                                        ANDROID_DLEXT_RESERVED_ADDRESS_HINT |
-                                        ANDROID_DLEXT_WRITE_RELRO |
-                                        ANDROID_DLEXT_USE_RELRO |
-                                        ANDROID_DLEXT_USE_LIBRARY_FD,
-};
-
-typedef struct {
-  uint64_t flags;
-  void*   reserved_addr;
-  size_t  reserved_size;
-  int     relro_fd;
-  int     library_fd;
-} android_dlextinfo;
-
-#endif  // BASE_ANDROID_LINKER_ANDROID_DLEXT_H_