MojoAsyncResourceHandler: Ignore Resume/OnWritable calls after error.

content/browser/loader/mojo_async_resource_handler_unittest.cc

 // Copyright 2016 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.
 
 #include "content/browser/loader/mojo_async_resource_handler.h"
 
 #include <string.h>
 
 #include <utility>
 
@@ skipping 166 matching lines @@
   TestResourceController() {}
   ~TestResourceController() override {}
 
   void Cancel() override { ADD_FAILURE() << "Cancel should not be called."; }
 
   void CancelAndIgnore() override {
     ADD_FAILURE() << "CancelAndIgnore should not be called.";
   }
 
   void CancelWithError(int error_code) override {
+    // While cancelling more than once is legal, none of these tests should do
+    // it.
+    EXPECT_FALSE(is_cancel_with_error_called_);
+
     is_cancel_with_error_called_ = true;
     error_ = error_code;
     if (quit_closure_)
       quit_closure_.Run();
   }
 
   void Resume() override { ++num_resume_calls_; }
 
   void RunUntilCancelWithErrorCalled() {
     base::RunLoop run_loop;
@@ skipping 935 matching lines @@
     }
   }
   EXPECT_EQ("B", body);
 }
 
 INSTANTIATE_TEST_CASE_P(MojoAsyncResourceHandlerWithAllocationSizeTest,
                         MojoAsyncResourceHandlerWithAllocationSizeTest,
                         ::testing::Values(8, 32 * 2014));
 }  // namespace
 }  // namespace content