[ICU] Avoid reading ICU data files in render process.

base/i18n/icu_util.cc

 // Copyright (c) 2012 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/i18n/icu_util.h"
 
-#include "build/build_config.h"
-
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 29 matching lines @@
 
 #if !defined(NDEBUG)
 // Assert that we are not called more than once.  Even though calling this
 // function isn't harmful (ICU can handle it), being called twice probably
 // indicates a programming error.
 bool g_called_once = false;
 bool g_check_called_once = true;
 #endif
 }
 
+
+#if defined(OS_ANDROID)
+bool InitializeICUWithFileDescriptor(int data_fd) {
+#if !defined(NDEBUG)
+  DCHECK(!g_check_called_once || !g_called_once);
+  g_called_once = true;
+#endif
+
+#if (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_STATIC)
+  // The ICU data is statically linked.
+  return true;
+#elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE)
+  CR_DEFINE_STATIC_LOCAL(base::MemoryMappedFile, mapped_file, ());
+  if (!mapped_file.IsValid()) {
+    if (!mapped_file.Initialize(base::File(data_fd))) {
+      LOG(ERROR) << "Couldn't mmap icu data file";
+      return false;
+    }
+  }
+  UErrorCode err = U_ZERO_ERROR;
+  udata_setCommonData(const_cast<uint8*>(mapped_file.data()), &err);
+  return err == U_ZERO_ERROR;
+#endif // ICU_UTIL_DATA_FILE
+}
+#endif
+
+
 bool InitializeICU() {
 #if !defined(NDEBUG)
   DCHECK(!g_check_called_once || !g_called_once);
   g_called_once = true;
 #endif
 
 #if (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_SHARED)
   // We expect to find the ICU data module alongside the current module.
   FilePath data_path;
   PathService::Get(base::DIR_MODULE, &data_path);
@@ skipping 64 matching lines @@
 }
 
 void AllowMultipleInitializeCallsForTesting() {
 #if !defined(NDEBUG)
   g_check_called_once = false;
 #endif
 }
 
 }  // namespace i18n
 }  // namespace base