mandoline: Reland "Fix ICU initialization".

mojo/runner/init.cc

Index: mojo/runner/init.cc
diff --git a/mojo/runner/init.cc b/mojo/runner/init.cc
index a5cc9e1a63a121607c6512d96306066808c424db..b76dfc634efe9e5fa0e7e503ec50d0b299e19872 100644
--- a/mojo/runner/init.cc
+++ b/mojo/runner/init.cc
@@ -8,6 +8,7 @@
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/files/file_path.h"
+#include "base/i18n/icu_util.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/strings/string_split.h"
@@ -60,5 +61,23 @@ void WaitForDebuggerIfNecessary() {
   }
 }
 
+void CallLibraryEarlyInitialization(base::NativeLibrary app_library) {
+  // Do whatever warming that the mojo application wants.
+  typedef void (*LibraryEarlyInitFunction)(const uint8*);
+  LibraryEarlyInitFunction init_function =
+      reinterpret_cast<LibraryEarlyInitFunction>(
+          base::GetFunctionPointerFromNativeLibrary(app_library,
+                                                    "InitializeBase"));
+  if (init_function) {
+    // Get the ICU data that we prewarmed in the runner and then pass it to
+    // the copy of icu in the mojo binary that we're running.
+    const uint8* icu_data = base::i18n::GetRawIcuMemory();
+    init_function(icu_data);
+  }
+
+  // TODO(erg): All chromium binaries load base. We might want to make a
+  // general system for other people.
+}
+
 }  // namespace runner
 }  // namespace mojo