Instant: Use only one hidden WebContents per profile.

chrome/chrome_browser_ui.gypi

Index: chrome/chrome_browser_ui.gypi
diff --git a/chrome/chrome_browser_ui.gypi b/chrome/chrome_browser_ui.gypi
index 7358acaba8fb0b64e0d5b9fa88c3b38ee98f2063..9bfa5cb199c58a54eea27d249be8eaa391ed8044 100644
--- a/chrome/chrome_browser_ui.gypi
+++ b/chrome/chrome_browser_ui.gypi
@@ -746,12 +746,12 @@
         'browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm',
         'browser/ui/cocoa/tab_contents/favicon_util_mac.h',
         'browser/ui/cocoa/tab_contents/favicon_util_mac.mm',
-        'browser/ui/cocoa/tab_contents/instant_preview_controller_mac.h',
-        'browser/ui/cocoa/tab_contents/instant_preview_controller_mac.mm',
-        'browser/ui/cocoa/tab_contents/preview_drop_shadow_view.h',
-        'browser/ui/cocoa/tab_contents/preview_drop_shadow_view.mm',
-        'browser/ui/cocoa/tab_contents/previewable_contents_controller.h',
-        'browser/ui/cocoa/tab_contents/previewable_contents_controller.mm',
+        'browser/ui/cocoa/tab_contents/instant_overlay_controller_mac.h',
+        'browser/ui/cocoa/tab_contents/instant_overlay_controller_mac.mm',
+        'browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.h',
+        'browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.mm',
+        'browser/ui/cocoa/tab_contents/overlayable_contents_controller.h',
+        'browser/ui/cocoa/tab_contents/overlayable_contents_controller.mm',
         'browser/ui/cocoa/tab_contents/render_view_context_menu_mac.h',
         'browser/ui/cocoa/tab_contents/render_view_context_menu_mac.mm',
         'browser/ui/cocoa/tab_contents/sad_tab_controller.h',
@@ -1053,8 +1053,8 @@
         'browser/ui/gtk/infobars/translate_infobar_base_gtk.h',
         'browser/ui/gtk/infobars/translate_message_infobar_gtk.cc',
         'browser/ui/gtk/infobars/translate_message_infobar_gtk.h',
-        'browser/ui/gtk/instant_preview_controller_gtk.cc',
-        'browser/ui/gtk/instant_preview_controller_gtk.h',
+        'browser/ui/gtk/instant_overlay_controller_gtk.cc',
+        'browser/ui/gtk/instant_overlay_controller_gtk.h',
         'browser/ui/gtk/javascript_app_modal_dialog_gtk.cc',
         'browser/ui/gtk/javascript_app_modal_dialog_gtk.h',
         'browser/ui/gtk/location_bar_view_gtk.cc',
@@ -1555,8 +1555,8 @@
         'browser/ui/views/frame/browser_desktop_root_window_host_win.h',
         'browser/ui/views/frame/glass_browser_frame_view.cc',
         'browser/ui/views/frame/glass_browser_frame_view.h',
-        'browser/ui/views/frame/instant_preview_controller_views.cc',
-        'browser/ui/views/frame/instant_preview_controller_views.h',
+        'browser/ui/views/frame/instant_overlay_controller_views.cc',
+        'browser/ui/views/frame/instant_overlay_controller_views.h',
         'browser/ui/views/frame/minimize_button_metrics_win.cc',
         'browser/ui/views/frame/minimize_button_metrics_win.h',
         'browser/ui/views/frame/native_browser_frame.h',