Make the generated stubs weak. Enable the unittests that had conflicting symbols.

media/base/mock_media_filters.h

Index: media/base/mock_media_filters.h
diff --git a/media/base/mock_media_filters.h b/media/base/mock_media_filters.h
index 1d215c408ab07dbb8bbf450507ed3440724696cb..b8a8f74bdb55341a857a56d1b88618ae76fa7f4b 100644
--- a/media/base/mock_media_filters.h
+++ b/media/base/mock_media_filters.h
@@ -1,6 +1,11 @@
 // Copyright (c) 2009 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.
+//
+// TODO(ajwong): This whole file is deprecated in favor or gmock style mocks.
+// The deprecated classes have been moved into the old_mocks to avoid colliding
+// with the newer mock classes.  Once all the unittests have been migrated, this
+// should be deleted.
 
 #ifndef MEDIA_BASE_MOCK_MEDIA_FILTERS_H_
 #define MEDIA_BASE_MOCK_MEDIA_FILTERS_H_
@@ -20,6 +25,8 @@
 
 namespace media {
 
+namespace old_mocks {
+
 // Behaviors for MockDataSource filter.
 enum MockDataSourceBehavior {
   MOCK_DATA_SOURCE_NORMAL_INIT,
@@ -667,6 +674,8 @@ class InitializationHelper {
   DISALLOW_COPY_AND_ASSIGN(InitializationHelper);
 };
 
+}  // namespace old_mocks
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_MEDIA_FILTERS_H_