Added NavigationContext::IsPost.

ios/web/web_state/navigation_context_impl_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/web_state/navigation_context_impl.h"
 
 #import "ios/web/public/test/fakes/test_web_state.h"
 #include "net/http/http_response_headers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
@@ skipping 37 matching lines @@
 }
 
 // Tests NavigationContextImpl Setters.
 TEST_F(NavigationContextImplTest, Setters) {
   std::unique_ptr<NavigationContextImpl> context =
       NavigationContextImpl::CreateNavigationContext(
           &web_state_, url_, ui::PageTransition::PAGE_TRANSITION_FORWARD_BACK);
   ASSERT_TRUE(context);
 
   ASSERT_FALSE(context->IsSameDocument());
+  ASSERT_FALSE(context->IsPost());
   ASSERT_FALSE(context->GetError());
   ASSERT_NE(response_headers_.get(), context->GetResponseHeaders());
 
   // SetSameDocument
   context->SetIsSameDocument(true);
   EXPECT_TRUE(context->IsSameDocument());
+  ASSERT_FALSE(context->IsPost());
   EXPECT_FALSE(context->GetError());
   EXPECT_NE(response_headers_.get(), context->GetResponseHeaders());
 
+  // SetPost
+  context->SetIsPost(true);
+  EXPECT_TRUE(context->IsSameDocument());
+  ASSERT_TRUE(context->IsPost());
+  EXPECT_FALSE(context->GetError());
+  EXPECT_NE(response_headers_.get(), context->GetResponseHeaders());
+
   // SetErrorPage
   NSError* error = [[[NSError alloc] init] autorelease];
   context->SetError(error);
   EXPECT_TRUE(context->IsSameDocument());
+  ASSERT_TRUE(context->IsPost());
   EXPECT_EQ(error, context->GetError());
   EXPECT_NE(response_headers_.get(), context->GetResponseHeaders());
 
   // SetResponseHeaders
   context->SetResponseHeaders(response_headers_);
   EXPECT_TRUE(context->IsSameDocument());
+  ASSERT_TRUE(context->IsPost());
   EXPECT_EQ(error, context->GetError());
   EXPECT_EQ(response_headers_.get(), context->GetResponseHeaders());
 }
 
 }  // namespace web