Adds command line switch to disable resize lock

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 4383bb36f8b81e4ffbbc33573fb77825274cd94c..1fac9f55339e8b4f46e67d0158ee443feef03b15 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -269,6 +269,10 @@ const char kDisableRendererAccessibility[]  = "disable-renderer-accessibility";
 // Prevent renderer process backgrounding when set.
 const char kDisableRendererBackgrounding[]  = "disable-renderer-backgrounding";
 
+// Whether the resize lock is disabled. Default is false. This is generally only
+// useful for tests that want to force disabling.
+const char kDisableResizeLock[] = "disable-resize-lock";
+
 // Disable the seccomp filter sandbox (seccomp-bpf) (Linux only).
 const char kDisableSeccompFilterSandbox[]   = "disable-seccomp-filter-sandbox";