[fuchsia] Remove default_context.h/cc

To finish the default_context migration, remove the old default_context
files.

Test: CQ
Bug: 1090364
Change-Id: I415b793572ed6d9042a7fded0ae258f83446ad04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303781Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sharon Yang <yangsharon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799703}

base/fuchsia/default_context.cc

-// Copyright 2019 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.
-
-#include "base/fuchsia/default_context.h"
-
-#include <lib/sys/cpp/component_context.h>
-
-#include "base/fuchsia/file_utils.h"
-#include "base/no_destructor.h"
-
-namespace base {
-
-namespace {
-std::unique_ptr<sys::ComponentContext>* ProcessComponentContextPtr() {
-  static base::NoDestructor<std::unique_ptr<sys::ComponentContext>> value(
-      std::make_unique<sys::ComponentContext>(
-          sys::ServiceDirectory::CreateFromNamespace()));
-  return value.get();
-}
-}  // namespace
-
-namespace fuchsia {
-sys::ComponentContext* ComponentContextForCurrentProcess() {
-  return ProcessComponentContextPtr()->get();
-}
-}  // namespace fuchsia
-
-std::unique_ptr<sys::ComponentContext>
-ReplaceComponentContextForCurrentProcessForTest(
-    std::unique_ptr<sys::ComponentContext> context) {
-  std::swap(*ProcessComponentContextPtr(), context);
-  return context;
-}
-
-}  // namespace base

base/fuchsia/default_context.h

-// Copyright 2019 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 BASE_FUCHSIA_DEFAULT_CONTEXT_H_
-#define BASE_FUCHSIA_DEFAULT_CONTEXT_H_
-
-#include <memory>
-
-#include "base/base_export.h"
-
-namespace sys {
-class ComponentContext;
-}  // namespace sys
-
-namespace base {
-
-namespace fuchsia {
-
-// TODO(https://crbug.com/1090364): Remove this file when external dependencies
-// have been migrated to process_context.
-// Returns default sys::ComponentContext for the current process.
-BASE_EXPORT sys::ComponentContext* ComponentContextForCurrentProcess();
-
-}  // namespace fuchsia
-
-// Replaces the default sys::ComponentContext for the current process, and
-// returns the previously-active one.
-// Use the base::TestComponentContextForProcess rather than calling this
-// directly.
-BASE_EXPORT std::unique_ptr<sys::ComponentContext>
-ReplaceComponentContextForCurrentProcessForTest(
-    std::unique_ptr<sys::ComponentContext> context);
-
-}  // namespace base
-
-#endif  // BASE_FUCHSIA_DEFAULT_CONTEXT_H_

ui/base/ime/fuchsia/input_method_keyboard_controller_fuchsia.cc

@@ -8,7 +8,6 @@
 #include <utility>
 
 #include "base/check.h"
-#include "base/fuchsia/default_context.h"
 #include "base/fuchsia/fuchsia_logging.h"
 #include "base/fuchsia/process_context.h"
 #include "base/notreached.h"