It is time.

ui/base/ui_base.gyp

Index: ui/base/ui_base.gyp
diff --git a/ui/base/ui_base.gyp b/ui/base/ui_base.gyp
index 46557122e43dc54b331a7e2fdb51f65946415df8..c4f94f03ce070edb0ab96d06ae503ddda8ed945a 100644
--- a/ui/base/ui_base.gyp
+++ b/ui/base/ui_base.gyp
@@ -56,8 +56,6 @@
         'android/window_android.h',
         'android/window_android_compositor.h',
         'android/window_android_observer.h',
-        'base_window.cc',
-        'base_window.h',
         'clipboard/clipboard.cc',
         'clipboard/clipboard.h',
         'clipboard/clipboard_android.cc',
@@ -133,26 +131,14 @@
         'cursor/cursor.h',
         'cursor/cursor_android.cc',
         'cursor/cursor_loader.h',
-        'cursor/cursor_loader_ozone.cc',
-        'cursor/cursor_loader_ozone.h',
         'cursor/cursor_loader_win.cc',
         'cursor/cursor_loader_win.h',
         'cursor/cursor_loader_x11.cc',
         'cursor/cursor_loader_x11.h',
-        'cursor/cursor_ozone.cc',
         'cursor/cursor_util.cc',
         'cursor/cursor_util.h',
         'cursor/cursor_win.cc',
         'cursor/cursor_x11.cc',
-        'cursor/cursors_aura.cc',
-        'cursor/cursors_aura.h',
-        'cursor/image_cursors.cc',
-        'cursor/image_cursors.h',
-        'cursor/ozone/bitmap_cursor_factory_ozone.cc',
-        'cursor/ozone/bitmap_cursor_factory_ozone.h',
-        'default_theme_provider.cc',
-        'default_theme_provider.h',
-        'default_theme_provider_mac.mm',
         'device_form_factor_android.cc',
         'device_form_factor_android.h',
         'device_form_factor_desktop.cc',
@@ -296,8 +282,6 @@
         'models/tree_model.h',
         'models/tree_node_iterator.h',
         'models/tree_node_model.h',
-        'nine_image_painter_factory.cc',
-        'nine_image_painter_factory.h',
         'page_transition_types.cc',
         'page_transition_types.h',
         'page_transition_types_list.h',
@@ -316,16 +300,11 @@
         'resource/resource_handle.h',
         'text/bytes_formatting.cc',
         'text/bytes_formatting.h',
-        'theme_provider.cc',
-        'theme_provider.h',
         'touch/touch_device.cc',
         'touch/touch_device.h',
         'touch/touch_device_android.cc',
         'touch/touch_device_aurax11.cc',
-        'touch/touch_device_ozone.cc',
         'touch/touch_device_win.cc',
-        'touch/touch_editing_controller.cc',
-        'touch/touch_editing_controller.h',
         'touch/touch_enabled.cc',
         'touch/touch_enabled.h',
         'ui_base_export.h',
@@ -443,11 +422,6 @@
             'resource/resource_bundle_auralinux.cc',
           ],
         }],
-        ['use_ozone==1', {
-          'dependencies': [
-            '../ozone/ozone.gyp:ozone_base',
-          ],
-        }],
         ['use_aura==1 and OS=="win"', {
           'sources/': [
             ['exclude', 'dragdrop/drag_utils_aura.cc'],
@@ -472,8 +446,6 @@
               'sources/': [
                 ['include', '^dragdrop/os_exchange_data.cc'],
                 ['include', '^dragdrop/os_exchange_data.h'],
-                ['include', '^nine_image_painter_factory.cc'],
-                ['include', '^nine_image_painter_factory.h'],
               ],
             }],
           ],
@@ -553,8 +525,6 @@
             '../../third_party/mozilla/mozilla.gyp:mozilla',
           ],
           'sources!': [
-            'cursor/image_cursors.cc',
-            'cursor/image_cursors.h',
             'dragdrop/drag_utils.cc',
             'dragdrop/drag_utils.h',
           ],
@@ -581,30 +551,10 @@
             '../events/platform/x11/x11_events_platform.gyp:x11_events_platform',
           ],
         }],
-        ['toolkit_views==0', {
-          'sources!': [
-            'dragdrop/drag_drop_types.h',
-            'dragdrop/drop_target_event.cc',
-            'dragdrop/drop_target_event.h',
-            'dragdrop/os_exchange_data.cc',
-            'dragdrop/os_exchange_data.h',
-            'nine_image_painter_factory.cc',
-            'nine_image_painter_factory.h',
-          ],
-        }],
         ['OS=="android"', {
           'sources!': [
-            'cursor/image_cursors.cc',
-            'cursor/image_cursors.h',
-            'default_theme_provider.cc',
-            'dragdrop/drag_utils.cc',
-            'dragdrop/drag_utils.h',
             'l10n/l10n_font_util.cc',
-            'models/button_menu_item_model.cc',
-            'models/dialog_model.cc',
-            'theme_provider.cc',
             'touch/touch_device.cc',
-            'touch/touch_editing_controller.cc',
             'ui_base_types.cc',
           ],
           'dependencies': [
@@ -672,19 +622,6 @@
             'ime/input_method_imm32.h',
           ],
         }],
-        ['use_aura==0 or (desktop_linux==0 and use_ozone==0)', {
-          'sources!': [
-            'ime/input_method_auralinux.cc',
-            'ime/input_method_auralinux.h',
-            'ime/linux/fake_input_method_context.cc',
-            'ime/linux/fake_input_method_context.h',
-            'ime/linux/fake_input_method_context_factory.cc',
-            'ime/linux/fake_input_method_context_factory.h',
-            'ime/linux/linux_input_method_context.h',
-            'ime/linux/linux_input_method_context_factory.cc',
-            'ime/linux/linux_input_method_context_factory.h',
-          ],
-        }],
         ['use_x11==0', {
           'sources!': [
             'ime/composition_text_util_pango.cc',