Use std::function instead of base::Callback in net/http2/.

net/http2/decoder/payload_decoders/ping_payload_decoder_test.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 "net/http2/decoder/payload_decoders/ping_payload_decoder.h"
 
 #include <stddef.h>
 
-#include "base/bind.h"
 #include "base/logging.h"
 #include "net/http2/decoder/frame_parts.h"
 #include "net/http2/decoder/frame_parts_collector.h"
 #include "net/http2/decoder/http2_frame_decoder_listener.h"
 #include "net/http2/decoder/payload_decoders/payload_decoder_base_test_util.h"
 #include "net/http2/http2_constants.h"
 #include "net/http2/http2_structures_test_util.h"
 #include "net/http2/tools/http2_frame_builder.h"
 #include "net/http2/tools/http2_random.h"
 #include "net/http2/tools/random_decoder_test.h"
@@ skipping 34 matching lines @@
   void OnFrameSizeError(const Http2FrameHeader& header) override {
     VLOG(1) << "OnFrameSizeError: " << header;
     FrameError(header)->OnFrameSizeError(header);
   }
 };
 
 class PingPayloadDecoderTest
     : public AbstractPayloadDecoderTest<PingPayloadDecoder,
                                         PingPayloadDecoderPeer,
                                         Listener> {
- public:
-  static bool ApproveSizeForWrongSize(size_t size) {
-    return size != Http2PingFields::EncodedSize();
-  }
-
  protected:
   Http2PingFields RandPingFields() {
     Http2PingFields fields;
     test::Randomize(&fields, RandomPtr());
     return fields;
   }
 };
 
 // Confirm we get an error if the payload is not the correct size to hold
 // exactly one Http2PingFields.
 TEST_F(PingPayloadDecoderTest, WrongSize) {
+  auto approve_size = [](size_t size) {
+    return size != Http2PingFields::EncodedSize();
+  };
   Http2FrameBuilder fb;
   fb.Append(RandPingFields());
   fb.Append(RandPingFields());
   fb.Append(RandPingFields());
-  EXPECT_TRUE(VerifyDetectsFrameSizeError(
-      0, fb.buffer(),
-      base::Bind(&PingPayloadDecoderTest::ApproveSizeForWrongSize)));
+  EXPECT_TRUE(VerifyDetectsFrameSizeError(0, fb.buffer(), approve_size));
 }
 
 TEST_F(PingPayloadDecoderTest, Ping) {
   for (int n = 0; n < 100; ++n) {
     Http2PingFields fields = RandPingFields();
     Http2FrameBuilder fb;
     fb.Append(fields);
     Http2FrameHeader header(fb.size(), Http2FrameType::PING,
                             RandFlags() & ~Http2FrameFlag::FLAG_ACK,
                             RandStreamId());
@@ skipping 16 matching lines @@
     set_frame_header(header);
     FrameParts expected(header);
     expected.opt_ping = fields;
     EXPECT_TRUE(DecodePayloadAndValidateSeveralWays(fb.buffer(), expected));
   }
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net