Calls to rph updating existing handlers are ignored.

chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc

Index: chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
diff --git a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
index 9c767d07b0c77db0255e482eaf3a3073897ec4af..b02be862141e8ac9edcf28ca59d25ebf72afdd9a 100644
--- a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
+++ b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
@@ -465,6 +465,38 @@ TEST_F(ProtocolHandlerRegistryTest, TestIsEquivalentRegistered) {
   ASSERT_TRUE(registry()->HasRegisteredEquivalent(ph2));
 }
 
+TEST_F(ProtocolHandlerRegistryTest, TestSilentlyRegisterHandler) {
+  ProtocolHandler ph1 = CreateProtocolHandler("test", GURL("http://test/%s"),
+                                              "test1");
+  ProtocolHandler ph2 = CreateProtocolHandler("test", GURL("http://test/%s"),
+                                              "test2");
+  ProtocolHandler ph3 = CreateProtocolHandler("ignore", GURL("http://test/%s"),
+                                              "ignore1");
+  ProtocolHandler ph4 = CreateProtocolHandler("ignore", GURL("http://test/%s"),
+                                              "ignore2");
+
+  ASSERT_FALSE(registry()->SilentlyHandleRegisterHandlerRequest(ph1));
+  ASSERT_FALSE(registry()->IsRegistered(ph1));
+
+  registry()->OnAcceptRegisterProtocolHandler(ph1);
+  ASSERT_TRUE(registry()->IsRegistered(ph1));
+
+  ASSERT_TRUE(registry()->SilentlyHandleRegisterHandlerRequest(ph2));
+  ASSERT_FALSE(registry()->IsRegistered(ph1));
+  ASSERT_TRUE(registry()->IsRegistered(ph2));
+
+  ASSERT_FALSE(registry()->SilentlyHandleRegisterHandlerRequest(ph3));
+  ASSERT_FALSE(registry()->IsRegistered(ph3));
+
+  registry()->OnIgnoreRegisterProtocolHandler(ph3);
+  ASSERT_FALSE(registry()->IsRegistered(ph3));
+  ASSERT_TRUE(registry()->IsIgnored(ph3));
+
+  ASSERT_TRUE(registry()->SilentlyHandleRegisterHandlerRequest(ph4));
+  ASSERT_FALSE(registry()->IsRegistered(ph4));
+  ASSERT_TRUE(registry()->HasIgnoredEquivalent(ph4));
+}
+
 TEST_F(ProtocolHandlerRegistryTest, TestRemoveHandlerRemovesDefault) {
   ProtocolHandler ph1 = CreateProtocolHandler("test", "test1");
   ProtocolHandler ph2 = CreateProtocolHandler("test", "test2");