Delete the ClientSocketPoolHistograms class.

net/websockets/websocket_handshake_stream_create_helper_test.cc

 // Copyright 2013 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 "net/websockets/websocket_handshake_stream_create_helper.h"
 
 #include <string>
 #include <vector>
 
 #include "net/base/completion_callback.h"
@@ skipping 10 matching lines @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace net {
 namespace {
 
 // This class encapsulates the details of creating a mock ClientSocketHandle.
 class MockClientSocketHandleFactory {
  public:
   MockClientSocketHandleFactory()
-      : histograms_("a"),
-        pool_(1, 1, &histograms_, socket_factory_maker_.factory()) {}
+      : pool_(1, 1, socket_factory_maker_.factory()) {}
 
   // The created socket expects |expect_written| to be written to the socket,
   // and will respond with |return_to_read|. The test will fail if the expected
   // text is not written, or if all the bytes are not read.
   scoped_ptr<ClientSocketHandle> CreateClientSocketHandle(
       const std::string& expect_written,
       const std::string& return_to_read) {
     socket_factory_maker_.SetExpectations(expect_written, return_to_read);
     scoped_ptr<ClientSocketHandle> socket_handle(new ClientSocketHandle);
     socket_handle->Init(
         "a",
         scoped_refptr<MockTransportSocketParams>(),
         MEDIUM,
         CompletionCallback(),
         &pool_,
         BoundNetLog());
     return socket_handle.Pass();
   }
 
  private:
   WebSocketDeterministicMockClientSocketFactoryMaker socket_factory_maker_;
-  ClientSocketPoolHistograms histograms_;
   MockTransportClientSocketPool pool_;
 
   DISALLOW_COPY_AND_ASSIGN(MockClientSocketHandleFactory);
 };
 
 class TestConnectDelegate : public WebSocketStream::ConnectDelegate {
  public:
   ~TestConnectDelegate() override {}
 
   void OnSuccess(scoped_ptr<WebSocketStream> stream) override {}
@@ skipping 121 matching lines @@
 
   EXPECT_EQ(
       "permessage-deflate;"
       " client_max_window_bits=14; server_max_window_bits=14;"
       " server_no_context_takeover; client_no_context_takeover",
       stream->GetExtensions());
 }
 
 }  // namespace
 }  // namespace net