Revert of Hook up the Push API with GCM's new ability to own encryption keys.

chrome/browser/push_messaging/push_messaging_browsertest.cc

Index: chrome/browser/push_messaging/push_messaging_browsertest.cc
diff --git a/chrome/browser/push_messaging/push_messaging_browsertest.cc b/chrome/browser/push_messaging/push_messaging_browsertest.cc
index 2c543879e0ea3d215150359f744eabaa8100b0d1..4deed1630b9dac918f8007192978b864368b09b3 100644
--- a/chrome/browser/push_messaging/push_messaging_browsertest.cc
+++ b/chrome/browser/push_messaging/push_messaging_browsertest.cc
@@ -1094,27 +1094,6 @@
   EXPECT_TRUE(stored_app_identifier2.is_null());
 }
 
-IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, EncryptionKeyUniqueness) {
-  TryToSubscribeSuccessfully("1-0" /* expected_push_subscription_id */);
-
-  std::string first_public_key;
-  ASSERT_TRUE(RunScript("getCurve25519dh()", &first_public_key));
-  EXPECT_GE(first_public_key.size(), 32u);
-
-  std::string script_result;
-  gcm_service()->AddExpectedUnregisterResponse(gcm::GCMClient::SUCCESS);
-  ASSERT_TRUE(RunScript("unsubscribePush()", &script_result));
-  EXPECT_EQ("unsubscribe result: true", script_result);
-
-  TryToSubscribeSuccessfully("1-1" /* expected_push_subscription_id */);
-
-  std::string second_public_key;
-  ASSERT_TRUE(RunScript("getCurve25519dh()", &second_public_key));
-  EXPECT_GE(second_public_key.size(), 32u);
-
-  EXPECT_NE(first_public_key, second_public_key);
-}
-
 class PushMessagingIncognitoBrowserTest : public PushMessagingBrowserTest {
  public:
   ~PushMessagingIncognitoBrowserTest() override {}