Add LogoTracker to fetch search providers' logos.

The LogoTracker keeps track of the logo for a search provider. The logo
is downloaded, cached on disk, and periodically revalidated.

This code lives inside a component (search_provider_logos) so it can be
used on both Android and iOS.

BUG=178922
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267314

Review URL: https://codereview.chromium.org/162373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267349 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 20 insertions, 0 deletions

diff --git a/components/search_provider_logos/logo_common.cc b/components/search_provider_logos/logo_common.cc
new file mode 100644
index 0000000..322aed5
--- /dev/null
+++ b/components/search_provider_logos/logo_common.cc
@@ -0,0 +1,20 @@
+// Copyright 2014 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/search_provider_logos/logo_common.h"
+
+namespace search_provider_logos {
+
+const int64 kMaxTimeToLiveMS = GG_INT64_C(30 * 24 * 60 * 60 * 1000);  // 30 days
+
+LogoMetadata::LogoMetadata() : can_show_after_expiration(false) {}
+LogoMetadata::~LogoMetadata() {}
+
+EncodedLogo::EncodedLogo() {}
+EncodedLogo::~EncodedLogo() {}
+
+Logo::Logo() {}
+Logo::~Logo() {}
+
+}  // namespace search_provider_logos