Include implicit_cast.h at all users of it.

util/net/http_body_test.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/net/http_body.h"
 
 #include "gtest/gtest.h"
 #include "test/paths.h"
+#include "util/misc/implicit_cast.h"
 #include "util/net/http_body_test_util.h"
 
 namespace crashpad {
 namespace test {
 namespace {
 
 void ExpectBufferSet(const uint8_t* actual,
                      uint8_t expected_byte,
                      size_t num_expected_bytes) {
   for (size_t i = 0; i < num_expected_bytes; ++i) {
@@ skipping 179 matching lines @@
   EXPECT_EQ(expected_string, actual_string);
 }
 
 INSTANTIATE_TEST_CASE_P(VariableBufferSize,
                         CompositeHTTPBodyStreamBufferSize,
                         testing::Values(1, 2, 9, 16, 31, 128, 1024));
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad