Create CoreTabHelper, move remaining core TCW functionality into it.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index a949ad1c2169bac8b2e79a87d24bbd57e5b42785..9ad21e38ae7516cce6693057a15d80e73195e8ab 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1731,8 +1731,6 @@
         'browser/password_manager/password_store_x.h',
         'browser/password_manager_delegate_impl.cc',
         'browser/password_manager_delegate_impl.h',
-        'browser/pdf_unsupported_feature.cc',
-        'browser/pdf_unsupported_feature.h',
         'browser/platform_util.h',
         'browser/platform_util_aura.cc',
         'browser/platform_util_chromeos.cc',
@@ -2083,6 +2081,8 @@
         'browser/safe_browsing/safe_browsing_store.h',
         'browser/safe_browsing/safe_browsing_store_file.cc',
         'browser/safe_browsing/safe_browsing_store_file.h',
+        'browser/safe_browsing/safe_browsing_tab_observer.cc',
+        'browser/safe_browsing/safe_browsing_tab_observer.h',
         'browser/safe_browsing/safe_browsing_util.cc',
         'browser/safe_browsing/safe_browsing_util.h',
         'browser/safe_browsing/signature_util_posix.cc',
@@ -2423,6 +2423,8 @@
         'browser/translate/translate_tab_helper.h',
         'browser/transport_security_persister.cc',
         'browser/transport_security_persister.h',
+        'browser/ui/alternate_error_tab_observer.cc',
+        'browser/ui/alternate_error_tab_observer.h',
         'browser/ui/app_modal_dialogs/app_modal_dialog.cc',
         'browser/ui/app_modal_dialogs/app_modal_dialog.h',
         'browser/ui/app_modal_dialogs/app_modal_dialog_queue.cc',
@@ -2447,8 +2449,6 @@
         'browser/ui/bookmarks/bookmark_tab_helper_delegate.h',
         'browser/ui/browser.cc',
         'browser/ui/browser.h',
-        'browser/ui/fullscreen_controller.cc',
-        'browser/ui/fullscreen_controller.h',
         'browser/ui/browser_dialogs.h',
         'browser/ui/browser_init.cc',
         'browser/ui/browser_init.h',
@@ -2932,6 +2932,8 @@
         'browser/ui/find_bar/find_notification_details.h',
         'browser/ui/find_bar/find_tab_helper.cc',
         'browser/ui/find_bar/find_tab_helper.h',
+        'browser/ui/fullscreen_controller.cc',
+        'browser/ui/fullscreen_controller.h',
         'browser/ui/fullscreen_exit_bubble.cc',
         'browser/ui/fullscreen_exit_bubble.h',
         'browser/ui/fullscreen_exit_bubble_type.cc',
@@ -3225,6 +3227,10 @@
         'browser/ui/panels/panel_titlebar_view_cocoa.mm',
         'browser/ui/panels/panel_window_controller_cocoa.h',
         'browser/ui/panels/panel_window_controller_cocoa.mm',
+        'browser/ui/pdf/pdf_tab_observer.cc',
+        'browser/ui/pdf/pdf_tab_observer.h',
+        'browser/ui/pdf/pdf_unsupported_feature.cc',
+        'browser/ui/pdf/pdf_unsupported_feature.h',
         'browser/ui/prefs/prefs_tab_helper.cc',
         'browser/ui/prefs/prefs_tab_helper.h',
         'browser/ui/profile_error_dialog.cc',
@@ -3245,15 +3251,19 @@
         'browser/ui/search_engines/template_url_table_model.h',
         'browser/ui/select_file_dialog.cc',
         'browser/ui/select_file_dialog.h',
+        'browser/ui/snapshot_tab_helper.cc',
+        'browser/ui/snapshot_tab_helper.h',
         'browser/ui/status_bubble.h',
         'browser/ui/sync/browser_synced_window_delegate.h',
         'browser/ui/sync/browser_synced_window_delegate.cc',
         'browser/ui/sync/tab_contents_wrapper_synced_tab_delegate.cc',
         'browser/ui/sync/tab_contents_wrapper_synced_tab_delegate.h',
+        'browser/ui/tab_contents/core_tab_helper.cc',
+        'browser/ui/tab_contents/core_tab_helper.h',
+        'browser/ui/tab_contents/core_tab_helper_delegate.cc',
+        'browser/ui/tab_contents/core_tab_helper_delegate.h',
         'browser/ui/tab_contents/tab_contents_wrapper.cc',
         'browser/ui/tab_contents/tab_contents_wrapper.h',
-        'browser/ui/tab_contents/tab_contents_wrapper_delegate.cc',
-        'browser/ui/tab_contents/tab_contents_wrapper_delegate.h',
         'browser/ui/tabs/dock_info.cc',
         'browser/ui/tabs/dock_info.h',
         'browser/ui/tabs/dock_info_aura.cc',