Properly throw java exceptions from shouldOverrideUrlLoading

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 157 matching lines @@
     "android/event_log.cc",
     "android/event_log.h",
     "android/field_trial_list.cc",
     "android/field_trial_list.h",
     "android/fifo_utils.cc",
     "android/fifo_utils.h",
     "android/important_file_writer_android.cc",
     "android/important_file_writer_android.h",
     "android/java_handler_thread.cc",
     "android/java_handler_thread.h",
+    "android/java_message_handler_factory.h",
     "android/java_runtime.cc",
     "android/java_runtime.h",
     "android/jni_android.cc",
     "android/jni_android.h",
     "android/jni_array.cc",
     "android/jni_array.h",
     "android/jni_registrar.cc",
     "android/jni_registrar.h",
     "android/jni_string.cc",
     "android/jni_string.h",
@@ skipping 2241 matching lines @@
       "android/java/templates/NativeLibraries.template",
     ]
     package_name = "org/chromium/base/library_loader"
   }
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
-    java_files =
-        [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
+    java_files = [
+      "test/android/java/src/org/chromium/base/ContentUriTestUtils.java",
+      "test/android/java/src/org/chromium/base/TestSystemMessageHandler.java",
+    ]
   }
 }