Cleaned up unused methods from WebStateImpl and NavigationContextImpl.

ios/web/web_state/web_state_observer_bridge_unittest.mm

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/public/web_state/web_state_observer_bridge.h"
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #include "ios/web/public/favicon_url.h"
 #import "ios/web/public/test/fakes/crw_test_web_state_observer.h"
@@ skipping 39 matching lines @@
             [observer_ startProvisionalNavigationInfo]->web_state);
   EXPECT_EQ(url, [observer_ startProvisionalNavigationInfo]->url);
 }
 
 // Tests |webState:didFinishNavigation:| forwarding.
 TEST_F(WebStateObserverBridgeTest, DidFinishNavigation) {
   ASSERT_FALSE([observer_ didFinishNavigationInfo]);
 
   GURL url("https://chromium.test/");
   std::unique_ptr<web::NavigationContext> context =
-      web::NavigationContextImpl::CreateNavigationContext(&test_web_state_, url,
-                                                          response_headers_);
+      web::NavigationContextImpl::CreateNavigationContext(&test_web_state_,
+                                                          url);
   bridge_->DidFinishNavigation(context.get());
 
   ASSERT_TRUE([observer_ didFinishNavigationInfo]);
   EXPECT_EQ(&test_web_state_, [observer_ didFinishNavigationInfo]->web_state);
   web::NavigationContext* actual_context =
       [observer_ didFinishNavigationInfo]->context.get();
   ASSERT_TRUE(actual_context);
   EXPECT_EQ(&test_web_state_, actual_context->GetWebState());
   EXPECT_EQ(context->IsSameDocument(), actual_context->IsSameDocument());
   EXPECT_EQ(context->IsErrorPage(), actual_context->IsErrorPage());
@@ skipping 174 matching lines @@
 // Tests |webState:webStateDidStartLoading:| forwarding.
 TEST_F(WebStateObserverBridgeTest, DidStartLoading) {
   ASSERT_FALSE([observer_ startLoadingInfo]);
 
   bridge_->DidStartLoading();
   ASSERT_TRUE([observer_ startLoadingInfo]);
   EXPECT_EQ(&test_web_state_, [observer_ startLoadingInfo]->web_state);
 }
 
 }  // namespace web