[iOS] Allow overriding icuctl.dat file location.

base/ios/ios_util.h

Index: base/ios/ios_util.h
diff --git a/base/ios/ios_util.h b/base/ios/ios_util.h
index e677adc755635f455349c032bb3647ea0f9d6974..3b276ff79981736345605077f8727b85a99a07c1 100644
--- a/base/ios/ios_util.h
+++ b/base/ios/ios_util.h
@@ -8,6 +8,7 @@
 #include <stdint.h>
 
 #include "base/base_export.h"
+#include "base/files/file_path.h"
 
 namespace base {
 namespace ios {
@@ -30,6 +31,14 @@ BASE_EXPORT bool IsRunningOnOrLater(int32_t major,
 // example by using the "RTL Psuedolanguage" option when launching from XCode).
 BASE_EXPORT bool IsInForcedRTL();
 
+// Stores the |path| of the ICU dat file in a global to be referenced later by
+// FilePathOfICUFile().  This should only be called once.
+BASE_EXPORT void OverridePathOfEmbeddedICU(const char* path);
+
+// Returns the overriden path set by OverridePathOfEmbeddedICU(), otherwise
+// returns invalid FilePath.
+BASE_EXPORT FilePath FilePathOfEmbeddedICU();
+
 }  // namespace ios
 }  // namespace base