Move Google Cache copy suggestion to an action button in the neterror interstitial

chrome/common/localized_error.h

Index: chrome/common/localized_error.h
diff --git a/chrome/common/localized_error.h b/chrome/common/localized_error.h
index 7d5e45a5073c9bc6329c74b1e02ad02cd767af73..a71740b1d38ab120905e85c10de6a0fe37f064f7 100644
--- a/chrome/common/localized_error.h
+++ b/chrome/common/localized_error.h
@@ -64,6 +64,13 @@ class LocalizedError {
   static const char kHttpErrorDomain[];
 
  private:
+  // Sets up the Google Cached Copy button experiment if part of the
+  // field trial. This promotes the Google cached copy suggestion from under
+  // the details section to a blue button.
+  static void EnableGoogleCachedCopyButtonExperiment(
+      base::ListValue* suggestions,
+      base::DictionaryValue* error_strings);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(LocalizedError);
 };