Remove PinnedContentsInfoBubble which doesn't look like it is used.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 3496 matching lines @@
         'browser/ui/views/notifications/balloon_view.h',
         'browser/ui/views/notifications/balloon_view_host.cc',
         'browser/ui/views/notifications/balloon_view_host.h',
         'browser/ui/views/omnibox/omnibox_view_views.cc',
         'browser/ui/views/omnibox/omnibox_view_views.h',
         'browser/ui/views/omnibox/omnibox_view_win.cc',
         'browser/ui/views/omnibox/omnibox_view_win.h',
         'browser/ui/views/page_info_bubble_view.cc',
         'browser/ui/views/page_info_bubble_view.h',
         'browser/ui/views/page_info_window.h',
-        'browser/ui/views/pinned_contents_info_bubble.cc',
-        'browser/ui/views/pinned_contents_info_bubble.h',
         'browser/ui/views/reload_button.cc',
         'browser/ui/views/reload_button.h',
         'browser/ui/views/repost_form_warning_view.cc',
         'browser/ui/views/repost_form_warning_view.h',
         'browser/ui/views/restart_message_box.cc',
         'browser/ui/views/restart_message_box.h',
         'browser/ui/views/sad_tab_view.cc',
         'browser/ui/views/sad_tab_view.h',
         'browser/ui/views/shell_dialogs_aura.cc',
         'browser/ui/views/shell_dialogs_win.cc',
@@ skipping 1287 matching lines @@
                 ['include', '^browser/ui/views/location_bar/suggested_text_view.h'],
                 ['include', '^browser/ui/views/location_bar/star_view.cc'],
                 ['include', '^browser/ui/views/location_bar/star_view.h'],
                 ['include', '^browser/ui/views/notifications/balloon_view.cc'],
                 ['include', '^browser/ui/views/notifications/balloon_view.h'],
                 ['include', '^browser/ui/views/notifications/balloon_view_host.cc'],
                 ['include', '^browser/ui/views/notifications/balloon_view_host.h'],
                 ['include', '^browser/ui/views/omnibox/omnibox_view_views.cc'],
                 ['include', '^browser/ui/views/omnibox/omnibox_view_views.h'],
                 ['include', '^browser/ui/views/page_info_bubble_view.cc'],
-                ['include', '^browser/ui/views/pinned_contents_info_bubble.cc'],
-                ['include', '^browser/ui/views/pinned_contents_info_bubble.h'],
                 ['include', '^browser/ui/views/profile_tag_view.cc'],
                 ['include', '^browser/ui/views/profile_tag_view.h'],
                 ['include', '^browser/ui/views/reload_button.cc'],
                 ['include', '^browser/ui/views/reload_button.h'],
                 ['include', '^browser/ui/views/restart_message_box.cc'],
                 ['include', '^browser/ui/views/restart_message_box.h'],
                 ['include', '^browser/ui/views/sad_tab_view.cc'],
                 ['include', '^browser/ui/views/sad_tab_view.h'],
                 ['include', '^browser/ui/views/simple_message_box_views.cc'],
                 ['include', '^browser/ui/views/simple_message_box_views.h'],
@@ skipping 428 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/history/in_memory_url_index_cache.proto' ],
       'variables': {
         'proto_in_dir': 'browser/history',
         'proto_out_dir': 'chrome/browser/history',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }