Support ICU on Android

mojo/icu/icu.cc

+// 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.
+
+#include "mojo/icu/icu.h"
+
+#include "mojo/public/cpp/application/application_impl.h"
+#include "services/icu_data/icu_data.mojom.h"
+#include "third_party/icu/source/common/unicode/putil.h"
+#include "third_party/icu/source/common/unicode/udata.h"
+
+#if !defined(OS_ANDROID)
+#include "base/i18n/icu_util.h"
+#endif
+
+namespace mojo {
+namespace icu {
+namespace {
+
+// These values are for Android arm32.
+const char kDataHash[] = "750429c6b974f0207c476910cb688f08936317aa";
+const int64_t kDataSize = 6038640;
+
+class Callback {
+ public:
+  void Run(mojo::ScopedSharedBufferHandle handle) const {
+    void* ptr = nullptr;
+    mojo::MapBuffer(handle.get(), 0, kDataSize, &ptr,
+                    MOJO_MAP_BUFFER_FLAG_NONE);
+    UErrorCode err = U_ZERO_ERROR;
+    udata_setCommonData(ptr, &err);
+    // Leak the handle because we never unmap the buffer.
+    (void)handle.release();
+  };
+};
+}
+
+void Initialize(ApplicationImpl* app) {
+#if !defined(OS_ANDROID)
+  // On desktop platforms, the icu data table is stored in a file on disk, which
+  // can be loaded using base.
+  base::i18n::InitializeICU();
+  return;
+#endif
+
+  icu_data::ICUDataPtr icu_data;
+  app->ConnectToService("mojo:icu_data", &icu_data);
+  icu_data->Map(kDataHash, Callback());
+  icu_data.WaitForIncomingMethodCall();
+}
+
+}  // namespace icu
+}  // namespace mojo