Revert of [Service Manager] Get rid of dynamic service discovery

services/service_manager/public/cpp/standalone_service/main.cc

 // 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.
 
 #include "base/at_exit.h"
+#include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/debug/stack_trace.h"
 #include "base/i18n/icu_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/path_service.h"
 #include "base/process/launch.h"
 #include "services/service_manager/public/c/main.h"
 #include "services/service_manager/public/cpp/standalone_service/standalone_service.h"
 #include "services/service_manager/public/cpp/standalone_service/switches.h"
 #include "services/service_manager/public/interfaces/service.mojom.h"
 #include "services/service_manager/runner/init.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/bundle_locations.h"
 #endif
 
 namespace {
 
+// Cross-platform helper to override the necessary hard-coded path location
+// used to load ICU data.
+//
+// TODO(rockot): We should just parameterize InitializeICU so hacks like
+// this are unnecessary.
+class ScopedIcuDataDirOverride {
+ public:
+  ScopedIcuDataDirOverride(const base::FilePath& path) {
+#if defined(OS_WIN)
+    base::PathService::Get(base::DIR_MODULE, &original_path_);
+#elif defined(OS_MACOSX)
+    original_path_= base::mac::FrameworkBundlePath();
+#else
+    base::PathService::Get(base::DIR_EXE, &original_path_);
+#endif
+
+    if (!path.empty())
+      SetPathOverride(path);
+  }
+
+  ~ScopedIcuDataDirOverride() { SetPathOverride(original_path_); }
+
+ private:
+  static void SetPathOverride(const base::FilePath& path) {
+#if defined(OS_WIN)
+    base::PathService::Override(base::DIR_MODULE, path);
+#elif defined(OS_MACOSX)
+    base::mac::SetOverrideFrameworkBundlePath(path);
+#else
+    base::PathService::Override(base::DIR_EXE, path);
+#endif
+  }
+
+  base::FilePath original_path_;
+};
+
 // TODO(rockot): We should consider removing ServiceMain and instead allowing
 // service sources to define a CreateService method which returns a new instance
 // of service_manager::Service. This would reduce boilerplate in service sources
 // since they all effectively do the same thing via
 // service_manager::ServiceRunner.
 void RunServiceMain(service_manager::mojom::ServiceRequest request) {
   MojoResult result = ServiceMain(request.PassMessagePipe().release().value());
   DCHECK_EQ(result, MOJO_RESULT_OK);
 }
 
 }  // namespace
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   base::CommandLine::Init(argc, argv);
 
 #if !defined(OFFICIAL_BIULD) && defined(OS_WIN)
   base::RouteStdioToConsole(false);
 #endif
 
   service_manager::InitializeLogging();
 
-  base::i18n::InitializeICU();
+  {
+    base::FilePath icu_data_dir = base::CommandLine::ForCurrentProcess()
+        ->GetSwitchValuePath(service_manager::switches::kIcuDataDir);
+    ScopedIcuDataDirOverride path_override(icu_data_dir);
+    base::i18n::InitializeICU();
+  }
 
 #if !defined(OFFICIAL_BUILD)
   // Initialize stack dumping before initializing sandbox to make sure symbol
   // names in all loaded libraries will be cached.
   base::debug::EnableInProcessStackDumping();
 #endif
 
   service_manager::WaitForDebuggerIfNecessary();
 
   service_manager::RunStandaloneService(base::Bind(&RunServiceMain));
   return 0;
 }