Use centered app list position whenever virtual keyboard is allowed.

chrome/browser/ui/app_list/app_list_view_delegate.cc

Index: chrome/browser/ui/app_list/app_list_view_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index 4627efcc9648850013a6a5d499c8c4c6363f393a..e85b9827ab2d119c21d022e37a8dfe4b37db3af6 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -45,6 +45,8 @@
 #endif
 
 #if defined(USE_ASH)
+#include "ash/shell.h"
+#include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.h"
 #endif
 
@@ -429,6 +431,19 @@ bool AppListViewDelegate::ShouldCenterWindow() const {
     return true;
 #endif
 
+#if defined(USE_ASH)
+  // If it is at all possible to enter maximize mode in this configuration
+  // (which has a virtual keyboard), we should use the experimental position.
+  // This avoids having the app list change shape and position as the user
+  // enters and exits maximize mode.
+  if (ash::Shell::HasInstance() &&
+      ash::Shell::GetInstance()
+          ->maximize_mode_controller()
+          ->CanEnterMaximizeMode()) {
+    return true;
+  }
+#endif
+
   return false;
 }