Make the ENABLE_APP_LIST build flag work on Linux

chrome/browser/ui/apps/app_info_dialog.h

Index: chrome/browser/ui/apps/app_info_dialog.h
diff --git a/chrome/browser/ui/apps/app_info_dialog.h b/chrome/browser/ui/apps/app_info_dialog.h
index 62a25bb498c9db1b9e59e83edf35ccf67653e693..433121102e67df0597981bb5ead781ea5f39c351 100644
--- a/chrome/browser/ui/apps/app_info_dialog.h
+++ b/chrome/browser/ui/apps/app_info_dialog.h
@@ -25,7 +25,9 @@ class Size;
 
 // Used for UMA to track where the App Info dialog is launched from.
 enum AppInfoLaunchSource {
+#if defined(ENABLE_APP_LIST)
   FROM_APP_LIST,         // Launched from the app list context menu.
+#endif
   FROM_EXTENSIONS_PAGE,  // Launched from the chrome://extensions page.
   FROM_APPS_PAGE,        // Launched from chrome://apps context menu.
   NUM_LAUNCH_SOURCES,
@@ -38,6 +40,7 @@ bool CanShowAppInfoDialog();
 // Returns the size of the native window container for the app info dialog.
 gfx::Size GetAppInfoNativeDialogSize();
 
+#if defined(ENABLE_APP_LIST)
 // Shows the chrome app information as a frameless window for the given |app|
 // and |profile| at the given |app_list_bounds|. Appears 'inside' the app list.
 void ShowAppInfoInAppList(gfx::NativeWindow parent,
@@ -45,6 +48,7 @@ void ShowAppInfoInAppList(gfx::NativeWindow parent,
                           Profile* profile,
                           const extensions::Extension* app,
                           const base::Closure& close_callback);
+#endif
 
 // Shows the chrome app information in a native dialog box of the given |size|.
 void ShowAppInfoInNativeDialog(content::WebContents* web_contents,