Move common ImageFetcher component files to core/

components/image_fetcher/request_metadata_unittest.cc

-// 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.
-
-#include "components/image_fetcher/request_metadata.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace image_fetcher {
-
-TEST(RequestMetadataTest, Equality) {
-  RequestMetadata rhs;
-  RequestMetadata lhs;
-  rhs.mime_type = "testMimeType";
-  lhs.mime_type = "testMimeType";
-  rhs.http_response_code = 1;
-  lhs.http_response_code = 1;
-  rhs.from_http_cache = true;
-  lhs.from_http_cache = true;
-
-  EXPECT_EQ(rhs, lhs);
-}
-
-TEST(RequestMetadataTest, NoEquality) {
-  RequestMetadata rhs;
-  RequestMetadata lhs;
-  rhs.mime_type = "testMimeType";
-  lhs.mime_type = "testMimeType";
-  rhs.http_response_code = 1;
-  lhs.http_response_code = 1;
-  rhs.from_http_cache = true;
-  lhs.from_http_cache = true;
-
-  lhs.mime_type = "testOtherMimeType";
-  EXPECT_NE(rhs, lhs);
-  lhs.mime_type = "testMimeType";
-
-  lhs.http_response_code = 2;
-  EXPECT_NE(rhs, lhs);
-  lhs.http_response_code = 1;
-
-  lhs.from_http_cache = false;
-  EXPECT_NE(rhs, lhs);
-  lhs.from_http_cache = true;
-}
-
-}  // namespace image_fetcher