[fml] Remove unused ResourceMapping code. (#5811)

ResourceMapping-related code is no longer used.Moreover, there is an
ASan related-error in ResourceMappingDarwin:
https://logs.chromium.org/logs/fuchsia/buildbucket/cr-buildbucket.appspot.com/8940466063445826656/+/steps/test_results/0/steps/s___out_release-x64_host_tests_dart_schema_tests/0/logs/stdio/0

fml/BUILD.gn

@@ -77,8 +77,6 @@ source_set("fml") {
       "platform/darwin/paths_darwin.mm",
       "platform/darwin/platform_version.h",
       "platform/darwin/platform_version.mm",
-      "platform/darwin/resource_mapping_darwin.h",
-      "platform/darwin/resource_mapping_darwin.mm",
       "platform/darwin/scoped_block.h",
       "platform/darwin/scoped_block.mm",
       "platform/darwin/scoped_nsobject.h",

fml/icu_util.cc

@@ -38,15 +38,6 @@ class ICUContext {
       return true;
     }
 
-    // Check to see if the mapping is in the resources bundle.
-    if (PlatformHasResourcesBundle()) {
-      auto resource = GetResourceMapping(icu_data_path);
-      if (resource != nullptr && resource->GetSize() != 0) {
-        mapping_ = std::move(resource);
-        return true;
-      }
-    }
-
     // Check if the mapping can by directly accessed via a file path. In this
     // case, the data file needs to be next to the executable.
     auto directory = fml::paths::GetExecutableDirectoryPath();

fml/mapping.h

@@ -29,10 +29,6 @@ class Mapping {
   FML_DISALLOW_COPY_AND_ASSIGN(Mapping);
 };
 
-bool PlatformHasResourcesBundle();
-
-std::unique_ptr<Mapping> GetResourceMapping(const std::string& resource_name);
-
 class FileMapping : public Mapping {
  public:
   FileMapping(const std::string& path, bool executable = false);

fml/platform/darwin/resource_mapping_darwin.h

-// Copyright 2017 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 FLUTTER_FML_PLATFORM_DARWIN_RESOURCE_MAPPING_DARWIN_H_
-#define FLUTTER_FML_PLATFORM_DARWIN_RESOURCE_MAPPING_DARWIN_H_
-
-#include "flutter/fml/macros.h"
-#include "flutter/fml/mapping.h"
-
-namespace fml {
-
-class ResourceMappingDarwin : public Mapping {
- public:
-  ResourceMappingDarwin(const std::string& resource);
-
-  ~ResourceMappingDarwin() override;
-
-  size_t GetSize() const override;
-
-  const uint8_t* GetMapping() const override;
-
- private:
-  FileMapping actual_;
-
-  FML_DISALLOW_COPY_AND_ASSIGN(ResourceMappingDarwin);
-};
-
-}  // namespace fml
-
-#endif  // FLUTTER_FML_PLATFORM_DARWIN_RESOURCE_MAPPING_DARWIN_H_

fml/platform/darwin/resource_mapping_darwin.mm

-// Copyright 2017 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 "flutter/fml/platform/darwin/resource_mapping_darwin.h"
-
-#include <Foundation/Foundation.h>
-
-namespace fml {
-
-ResourceMappingDarwin::ResourceMappingDarwin(const std::string& resource)
-    : actual_([[[NSBundle mainBundle] pathForResource:@(resource.c_str()) ofType:nil] UTF8String],
-              false) {}
-
-ResourceMappingDarwin::~ResourceMappingDarwin() = default;
-
-size_t ResourceMappingDarwin::GetSize() const {
-  return actual_.GetSize();
-}
-
-const uint8_t* ResourceMappingDarwin::GetMapping() const {
-  return actual_.GetMapping();
-}
-
-}  // namespace fml

fml/platform/posix/mapping_posix.cc

@@ -15,31 +15,12 @@
 #include "flutter/fml/eintr_wrapper.h"
 #include "flutter/fml/unique_fd.h"
 
-#if OS_MACOSX
-
-#include "flutter/fml/platform/darwin/resource_mapping_darwin.h"
-using PlatformResourceMapping = fml::ResourceMappingDarwin;
-
-#else
-
-using PlatformResourceMapping = fml::FileMapping;
-
-#endif
-
 namespace fml {
 
 Mapping::Mapping() = default;
 
 Mapping::~Mapping() = default;
 
-bool PlatformHasResourcesBundle() {
-  return !std::is_same<PlatformResourceMapping, FileMapping>::value;
-}
-
-std::unique_ptr<Mapping> GetResourceMapping(const std::string& resource_name) {
-  return std::make_unique<PlatformResourceMapping>(resource_name);
-}
-
 FileMapping::FileMapping(const std::string& path, bool executable)
     : FileMapping(
           fml::UniqueFD{FML_HANDLE_EINTR(::open(path.c_str(), O_RDONLY))},

fml/platform/win/mapping_win.cc

@@ -13,22 +13,12 @@
 #include "flutter/fml/file.h"
 #include "flutter/fml/platform/win/wstring_conversion.h"
 
-using PlatformResourceMapping = fml::FileMapping;
-
 namespace fml {
 
 Mapping::Mapping() = default;
 
 Mapping::~Mapping() = default;
 
-bool PlatformHasResourcesBundle() {
-  return !std::is_same<PlatformResourceMapping, FileMapping>::value;
-}
-
-std::unique_ptr<Mapping> GetResourceMapping(const std::string& resource_name) {
-  return std::make_unique<PlatformResourceMapping>(resource_name);
-}
-
 FileMapping::FileMapping(const std::string& path, bool executable)
     : FileMapping(OpenFile(path.c_str(),
                            executable ? OpenPermission::kExecute

travis/licenses_golden/licenses_flutter

@@ -51,8 +51,6 @@ FILE: ../../../flutter/fml/platform/darwin/message_loop_darwin.mm
 FILE: ../../../flutter/fml/platform/darwin/paths_darwin.mm
 FILE: ../../../flutter/fml/platform/darwin/platform_version.h
 FILE: ../../../flutter/fml/platform/darwin/platform_version.mm
-FILE: ../../../flutter/fml/platform/darwin/resource_mapping_darwin.h
-FILE: ../../../flutter/fml/platform/darwin/resource_mapping_darwin.mm
 FILE: ../../../flutter/fml/platform/darwin/scoped_block.mm
 FILE: ../../../flutter/fml/platform/darwin/scoped_nsobject.h
 FILE: ../../../flutter/fml/platform/darwin/scoped_nsobject.mm