Delete ppapi/buildflags/buildflags.h

Transition ENABLE_PLUGINS users to content/public/common/buildflags.h.
Then delete ppapi/buildflags/buildflags.h and its GN target.

Bug: 40511450
Change-Id: I97d19a2a8a20c24ab95d0aec91f9903b6d5c8088
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6690442
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Owners-Override: Dave Tapuska <dtapuska@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1487200}
NOKEYCHECK=True
GitOrigin-RevId: ae572bef3647189819f1371c5da4841b25afa124

buildflags/BUILD.gn

diff --git a/buildflags/BUILD.gn b/buildflags/BUILD.gn
deleted file mode 100644
index e6c5cde..0000000
--- a/buildflags/BUILD.gn
+++ /dev/null
@@ -1,16 +0,0 @@
-# Copyright 2016 The Chromium Authors
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import("//build/config/features.gni")
-
-# To support the removal of ppapi we use just a static PPAPI definition
-# that depends on //content.
-source_set("buildflags") {
-  sources = [ "buildflags.h" ]
-  public_deps = [ "//build:blink_buildflags" ]
-
-  if (use_blink) {
-    public_deps += [ "//content/public/common:buildflags" ]
-  }
-}

buildflags/DEPS

diff --git a/buildflags/DEPS b/buildflags/DEPS
deleted file mode 100644
index a291259..0000000
--- a/buildflags/DEPS
+++ /dev/null
@@ -1,3 +0,0 @@
-include_rules = [
-  "+content/public/common/buildflags.h",
-]

buildflags/buildflags.h

diff --git a/buildflags/buildflags.h b/buildflags/buildflags.h
deleted file mode 100644
index 3cde163..0000000
--- a/buildflags/buildflags.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2025 The Chromium Authors
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef PPAPI_BUILDFLAGS_BUILDFLAGS_H_
-#define PPAPI_BUILDFLAGS_BUILDFLAGS_H_
-
-#include "build/blink_buildflags.h"
-#include "build/buildflag.h"  // IWYU pragma: export
-
-#if BUILDFLAG(USE_BLINK)
-#include "content/public/common/buildflags.h"
-#endif
-
-// IWYU pragma: always_keep
-
-// The ENABLE_PLUGINS build flag is moved into content/public/common but
-// many files still include this file, so we statically generate it with
-// an include of the content flag generation until all files are adjusted.
-#define BUILDFLAG_INTERNAL_ENABLE_PPAPI() (0)
-
-#endif  // PPAPI_BUILDFLAGS_BUILDFLAGS_H_