Plugs in the new thumbnailing algorithm to ThumbnailTabHelper.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 6c7a26e0eb412999608ad3e39854275a540d31f7..648c46aecc4305ef9e418da12a7b546500c737ac 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -683,6 +683,10 @@ const char kEnableSyncSyncedNotifications[] =
 // Enables context menu for selecting groups of tabs.
 const char kEnableTabGroupsContextMenu[]    = "enable-tab-groups-context-menu";
 
+// Enables fanciful thumbnail processing. Used with NTP for
+// instant-extended-api, where thumbnails are generally smaller.
+const char kEnableThumbnailRetargeting[]   = "enable-thumbnail-retargeting";
+
 // Enables Chrome Translate for "alpha languages", that may have less-reliable
 // translation quality than supported languages.
 const char kEnableTranslateAlphaLanguages[] =