[Merge M-55] Disable Web Payments in WebView

android_webview/browser/command_line_helper.h

Index: android_webview/browser/command_line_helper.h
diff --git a/android_webview/browser/command_line_helper.h b/android_webview/browser/command_line_helper.h
index 9a878527d42a45d75b94903b6cc62a26c8e0448a..9ad432652b68c4aecb2f51c5366f3e5cf381472f 100644
--- a/android_webview/browser/command_line_helper.h
+++ b/android_webview/browser/command_line_helper.h
@@ -20,6 +20,11 @@ class CommandLineHelper {
   static void AddEnabledFeature(base::CommandLine& command_line,
                                 const std::string& feature_name);
 
+  // Add a feature to the --disabled-features list, but only if it's not already
+  // enabled or disabled.
+  static void AddDisabledFeature(base::CommandLine& command_line,
+                                 const std::string& feature_name);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(CommandLineHelper);
 };