[Merge to M53] Remove "Go Back/Forward" from keyboard overlay

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index f9134ad844f5c9bb241a9f52977269142d44b640..5baa5c70b6c051e907b0c4d5d7f994d21ddbadf6 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -20,6 +20,12 @@ const base::Feature kAutomaticTabDiscarding{"AutomaticTabDiscarding",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
+// Enables the Backspace key to navigate back in the browser, as well as
+// Shift+Backspace to navigate forward.
+const base::Feature kBackspaceGoesBackFeature {
+  "BackspaceGoesBack", base::FEATURE_DISABLED_BY_DEFAULT
+};
+
 // Experiment to disable small cross-origin content. (http://crbug.com/608886)
 const base::Feature kBlockSmallContent{"BlockSmallPluginContent",
                                        base::FEATURE_DISABLED_BY_DEFAULT};