Move ChromiumMultiDex to BuildConfig.

tools/android/eclipse/.classpath

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- {% block header_message %}
 
 Eclipse classpath. See instructions at
 https://code.google.com/p/chromium/wiki/AndroidEclipseDev for setting up Eclipse
 for Chrome Android development.
 
 Obsolete entries can be found using:
 
   for f in $(grep -oP '(?<= path=")[^"]*' tools/android/eclipse/.classpath); do
@@ skipping 129 matching lines @@
     <classpathentry kind="src" path="out/Debug/gen/enums/tab_load_status_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/text_input_type_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/top_controls_state_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/touch_device_types_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/touch_handle_orientation_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/url_request_failed_job_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/web_display_mode"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/web_input_event_java"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/web_text_input_type"/>
     <classpathentry kind="src" path="out/Debug/gen/enums/window_open_disposition_java"/>
+    <classpathentry kind="src" path="out/Debug/gen/templates/base_chromium_build_config_gen"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/base_native_libraries_gen"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/chrome_version_java"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/dom_distiller_core_font_family_java"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/dom_distiller_core_theme_java"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/load_states_list"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/net_errors_java"/>
     <classpathentry kind="src" path="out/Debug/gen/templates/resource_id_java"/>
     <classpathentry kind="src" path="out/Debug/java_mojo/device_battery_mojo_bindings/src"/>
     <classpathentry kind="src" path="out/Debug/java_mojo/mojo_public_test_interfaces_mojom/src"/>
     <classpathentry kind="src" path="out/Debug/java_proto/cacheinvalidation_proto_java/src"/>
@@ skipping 69 matching lines @@
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/WebKit/public/blink_headers_java.jar"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/ui/accessibility/ui_accessibility_java.jar"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/ui/android/ui_java.jar"/>
 
     <!-- {% block additional_entries %} -->
     <!-- When this file is processed as a jinja2 template, additional
          <classpathentry> elements will be inserted here. -->
     <!-- {% endblock %} -->
 
 </classpath>