[protector] Support for collapsing multiple changes into a single one.

chrome/browser/protector/mock_setting_change.cc

Index: chrome/browser/protector/mock_setting_change.cc
diff --git a/chrome/browser/protector/mock_setting_change.cc b/chrome/browser/protector/mock_setting_change.cc
index 53bc9f3e7449ca0d096ec5a31663018670a60bfb..34581e0836f6041a95f00c22600d2cc8b3420461 100644
--- a/chrome/browser/protector/mock_setting_change.cc
+++ b/chrome/browser/protector/mock_setting_change.cc
@@ -25,6 +25,13 @@ MockSettingChange::MockSettingChange() {
       WillByDefault(Return(UTF8ToUTF16("Apply")));
   ON_CALL(*this, GetDiscardButtonText()).
       WillByDefault(Return(UTF8ToUTF16("Discard")));
+
+  ON_CALL(*this, GetApplyDisplayName()).
+      WillByDefault(Return(
+          DisplayName(kDefaultNamePriority, UTF8ToUTF16("new settings"))));
+
+  ON_CALL(*this, GetNewSettingURL()).WillByDefault(Return(GURL()));
+  ON_CALL(*this, CanBeMerged()).WillByDefault(Return(false));
 }
 
 MockSettingChange::~MockSettingChange() {