Fix cronet build after JNI registration change.

net/base/net_string_util_icu_alternatives_android.cc

Index: net/base/net_string_util_icu_alternatives_android.cc
diff --git a/net/base/net_string_util_icu_alternatives_android.cc b/net/base/net_string_util_icu_alternatives_android.cc
index 0551a03c565a883aecbbc7728e12dceea0e3549f..237b698ffc731e6c3d61e0ae28bd363cdea02465 100644
--- a/net/base/net_string_util_icu_alternatives_android.cc
+++ b/net/base/net_string_util_icu_alternatives_android.cc
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "net/base/net_string_util_icu_alternatives_android.h"
-
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/strings/string16.h"
@@ -113,8 +111,4 @@ bool ConvertToUTF16WithSubstitutions(const std::string& text,
   return true;
 }
 
-bool RegisterNetStringUtils(JNIEnv* env) {
-  return android::RegisterNativesImpl(env);
-}
-
 }  // namespace net