[Mac] Organize some files into chrome/browser/ui/cocoa/tab_contents/....

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
===================================================================
--- chrome/chrome_browser.gypi	(revision 71958)
+++ chrome/chrome_browser.gypi	(working copy)
@@ -2967,18 +2967,12 @@
         'browser/ui/cocoa/options/search_engine_list_model.mm',
         'browser/ui/cocoa/page_info_bubble_controller.h',
         'browser/ui/cocoa/page_info_bubble_controller.mm',
-        'browser/ui/cocoa/previewable_contents_controller.h',
-        'browser/ui/cocoa/previewable_contents_controller.mm',
         'browser/ui/cocoa/repost_form_warning_mac.h',
         'browser/ui/cocoa/repost_form_warning_mac.mm',
         'browser/ui/cocoa/restart_browser.h',
         'browser/ui/cocoa/restart_browser.mm',
         'browser/ui/cocoa/rwhvm_editcommand_helper.h',
         'browser/ui/cocoa/rwhvm_editcommand_helper.mm',
-        'browser/ui/cocoa/sad_tab_controller.h',
-        'browser/ui/cocoa/sad_tab_controller.mm',
-        'browser/ui/cocoa/sad_tab_view.h',
-        'browser/ui/cocoa/sad_tab_view.mm',
         'browser/ui/cocoa/scoped_authorizationref.h',
         'browser/ui/cocoa/search_engine_dialog_controller.h',
         'browser/ui/cocoa/search_engine_dialog_controller.mm',
@@ -2998,8 +2992,20 @@
         'browser/ui/cocoa/styled_text_field.mm',
         'browser/ui/cocoa/styled_text_field_cell.h',
         'browser/ui/cocoa/styled_text_field_cell.mm',
-        'browser/ui/cocoa/tab_contents_controller.h',
-        'browser/ui/cocoa/tab_contents_controller.mm',
+        'browser/ui/cocoa/tab_contents/previewable_contents_controller.h',
+        'browser/ui/cocoa/tab_contents/previewable_contents_controller.mm',
+        'browser/ui/cocoa/tab_contents/sad_tab_controller.h',
+        'browser/ui/cocoa/tab_contents/sad_tab_controller.mm',
+        'browser/ui/cocoa/tab_contents/sad_tab_view.h',
+        'browser/ui/cocoa/tab_contents/sad_tab_view.mm',
+        'browser/ui/cocoa/tab_contents/tab_contents_controller.h',
+        'browser/ui/cocoa/tab_contents/tab_contents_controller.mm',
+        'browser/ui/cocoa/tab_contents/web_contents_drag_source.h',
+        'browser/ui/cocoa/tab_contents/web_contents_drag_source.mm',
+        'browser/ui/cocoa/tab_contents/web_drag_source.h',
+        'browser/ui/cocoa/tab_contents/web_drag_source.mm',
+        'browser/ui/cocoa/tab_contents/web_drop_target.h',
+        'browser/ui/cocoa/tab_contents/web_drop_target.mm',
         'browser/ui/cocoa/tabs/side_tab_strip_controller.h',
         'browser/ui/cocoa/tabs/side_tab_strip_controller.mm',
         'browser/ui/cocoa/tabs/side_tab_strip_view.h',
@@ -3059,12 +3065,6 @@
         'browser/ui/cocoa/view_id_util.h',
         'browser/ui/cocoa/view_id_util.mm',
         'browser/ui/cocoa/view_resizer.h',
-        'browser/ui/cocoa/web_contents_drag_source.h',
-        'browser/ui/cocoa/web_contents_drag_source.mm',
-        'browser/ui/cocoa/web_drag_source.h',
-        'browser/ui/cocoa/web_drag_source.mm',
-        'browser/ui/cocoa/web_drop_target.h',
-        'browser/ui/cocoa/web_drop_target.mm',
         'browser/ui/cocoa/window_size_autosaver.h',
         'browser/ui/cocoa/window_size_autosaver.mm',
         'browser/ui/cocoa/wrench_menu/menu_tracked_button.h',