Remove the BackspaceGoesBack flag.

chrome/browser/resources/chromeos/keyboard_overlay.js

Index: chrome/browser/resources/chromeos/keyboard_overlay.js
diff --git a/chrome/browser/resources/chromeos/keyboard_overlay.js b/chrome/browser/resources/chromeos/keyboard_overlay.js
index 86a3ab02549f204147a3c19a8ae80845840565e8..8fec1419f6a14b9d5a34b879122393b2b87e53b4 100644
--- a/chrome/browser/resources/chromeos/keyboard_overlay.js
+++ b/chrome/browser/resources/chromeos/keyboard_overlay.js
@@ -227,13 +227,11 @@ function getShortcutData() {
     delete shortcutDataCache['0<>CTRL<>SHIFT'];
   }
 
-  if (!loadTimeData.getBoolean('backspaceGoesBackFeatureEnabled')) {
-    // If the "backspace key goes back" experiment is not enabled, then we
-    // clear the shortcuts for Backspace and Shift+Backspace to go back or
-    // forward respectively.
-    delete shortcutDataCache['backspace'];
-    delete shortcutDataCache['backspace<>SHIFT'];
-  }
+  // TODO(ojan): crbug.com/721141 Delete these two lines after running
+  // src/tools/gen_keyboard_overlay_data/gen_keyboard_overlay_data.py
+  // to not have these added to the shortcutDataCache in the first place.
+  delete shortcutDataCache['backspace'];
+  delete shortcutDataCache['backspace<>SHIFT'];

[afakhry, 2017/05/11 01:19:35]

Please remove these lines as well as the corresponding entries in
keyboard_overlay_data.js.

[ojan, 2017/05/11 18:25:25]

done

 
   return shortcutDataCache;
 }