Un-exclude chrome_plugin_host.cc and chrome_plugin_util.cc from the gyp-based

build following r10436.
Review URL: http://codereview.chromium.org/28176

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10453 0039d316-1c4b-4281-b951-d872f2087c98

chrome/chrome.gyp

@@ -293,7 +293,6 @@
             'common/gfx/emf.cc',
             'common/gfx/icon_util.cc',
             'common/gfx/path.cc',
-            'common/chrome_plugin_util.cc',
             'common/chrome_process_filter.cc',
             'common/classfactory.cc',
             'common/drag_drop_types.cc',
@@ -1178,7 +1177,6 @@
             'browser/app_modal_dialog_queue.cc',
             'browser/browser_accessibility.cc',
             'browser/browser_accessibility_manager.cc',
-            'browser/chrome_plugin_host.cc',
             'browser/dock_info.cc',
             'browser/drag_utils.cc',
             'browser/encoding_menu_controller_delegate.cc',