Add a flag for the Resizable Virtual Keyboard

This commit is part of the ongoing work for the Resizable Virtual
Keyboard. It adds a flag to chrome://flags to allow users to enable the feature.

BUG=1019990

Change-Id: I0f89eed6cde3ca59dc50f2b4efaf58c6241a997b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2037299
Reviewed-by: Scott Violet <[email protected]>
Commit-Queue: Curtis McMullan <[email protected]>
Cr-Commit-Position: refs/heads/master@{#739772}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 46cf743..0e1495b 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2104,6 +2104,9 @@
 extern const char kVirtualKeyboardBorderedKeyName[];
 extern const char kVirtualKeyboardBorderedKeyDescription[];
 
+extern const char kVirtualKeyboardFloatingResizableName[];
+extern const char kVirtualKeyboardFloatingResizableDescription[];
+
 extern const char kVirtualKeyboardName[];
 extern const char kVirtualKeyboardDescription[];