Implement WebPushProvider.unregister() in Chromium.

chrome/browser/services/gcm/push_messaging_browsertest.cc

Index: chrome/browser/services/gcm/push_messaging_browsertest.cc
diff --git a/chrome/browser/services/gcm/push_messaging_browsertest.cc b/chrome/browser/services/gcm/push_messaging_browsertest.cc
index ba6a81fae1179b8d8994592c7e617f80182a95c2..1a2183139ba74850fa3e825466069cb32ca59aaa 100644
--- a/chrome/browser/services/gcm/push_messaging_browsertest.cc
+++ b/chrome/browser/services/gcm/push_messaging_browsertest.cc
@@ -484,4 +484,41 @@ IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, HasPermissionSaysDenied) {
   EXPECT_EQ("permission status - denied", script_result);
 }
 
+IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, UnregisterSuccess) {
+  std::string script_result;
+
+  TryToRegisterSuccessfully("1-0" /* expected_push_registration_id */);
+
+  gcm_service()->AddExpectedUnregisterResponse(GCMClient::SUCCESS);
+
+  ASSERT_TRUE(RunScript("unregister()", &script_result));
+  EXPECT_EQ("unregister result: true", script_result);
+}
+
+IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, UnregisterNetworkError) {
+  std::string script_result;
+
+  TryToRegisterSuccessfully("1-0" /* expected_push_registration_id */);
+
+  gcm_service()->AddExpectedUnregisterResponse(GCMClient::NETWORK_ERROR);
+
+  ASSERT_TRUE(RunScript("unregister()", &script_result));
+  EXPECT_EQ("unregister error: "
+            "NetworkError: Failed to connect to the push server.",
+            script_result);
+}
+
+IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, UnregisterUnknownError) {
+  std::string script_result;
+
+  TryToRegisterSuccessfully("1-0" /* expected_push_registration_id */);
+
+  gcm_service()->AddExpectedUnregisterResponse(GCMClient::UNKNOWN_ERROR);
+
+  ASSERT_TRUE(RunScript("unregister()", &script_result));
+  EXPECT_EQ("unregister error: "
+            "UnknownError: Unexpected error while trying to unregister from the"
+            " push server.", script_result);
+}
+
 }  // namespace gcm