Remove --apps-new-install-bubble command line switch.

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 52e8dfa893d5f745ef09b10b85d089b8fc3a6d53..5a09394442609215608c272e5342155f6bb76af1 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -100,9 +100,6 @@ const char kAppModeAuthCode[]               = "app-mode-auth-code";
 // Value of OAuth2 refresh token for --force-app-mode.
 const char kAppModeOAuth2Token[]            = "app-mode-oauth-token";
 
-// Whether to always use the new app install bubble when installing an app.
-const char kAppsNewInstallBubble[]          = "apps-new-install-bubble";
-
 // Experimental native frame support for packaged apps.
 const char kAppsUseNativeFrame[]            = "apps-use-native-frame";