Revert of Move SecurityLevel into a class of its own

chrome/browser/ui/android/toolbar/toolbar_model_android.cc

Index: chrome/browser/ui/android/toolbar/toolbar_model_android.cc
diff --git a/chrome/browser/ui/android/toolbar/toolbar_model_android.cc b/chrome/browser/ui/android/toolbar/toolbar_model_android.cc
index 2ce0ed4cd0f0c7d538885c55fec6fd92ab098e38..d7437c3fd20851e137d7bb2e5c7b1ee7d4d95086 100644
--- a/chrome/browser/ui/android/toolbar/toolbar_model_android.cc
+++ b/chrome/browser/ui/android/toolbar/toolbar_model_android.cc
@@ -70,6 +70,16 @@
   return reinterpret_cast<intptr_t>(toolbar_model);
 }
 
+// static
+jint GetSecurityLevelForWebContents(JNIEnv* env,
+                                    jclass jcaller,
+                                    jobject jweb_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(jweb_contents);
+  DCHECK(web_contents);
+  return ToolbarModelImpl::GetSecurityLevelForWebContents(web_contents);
+}
+
 // Temporary method to allow us to surface a SHA-1 deprecation string on Android
 // in M42. This duplicates a subset of the logic from
 // ToolbarModelImpl::GetSecurityLevelForWebContents() and