blob: 7889969b89d8f6dd57829aa305b6f45b82f5fe3c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// 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 "chrome/browser/extensions/updater/extension_cache.h"
#include "base/memory/singleton.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/extensions/updater/extension_cache_impl.h"
#endif // OS_CHROMEOS
namespace extensions {
namespace {
#if !defined(OS_CHROMEOS)
// Implementation of ExtensionCache that doesn't cache anything.
// Real cache is used only on Chrome OS other OSes use this null implementation.
class ExtensionCacheNullImpl : public ExtensionCache {
public:
static ExtensionCacheNullImpl* GetInstance() {
return Singleton<ExtensionCacheNullImpl>::get();
}
// Implementation of ExtensionCache.
virtual void Start(const base::Closure& callback) OVERRIDE {
callback.Run();
}
virtual void Shutdown(const base::Closure& callback) OVERRIDE {
callback.Run();
}
virtual void AllowCaching(const std::string& id) OVERRIDE {
}
virtual bool GetExtension(const std::string& id,
base::FilePath* file_path,
std::string* version) OVERRIDE {
return false;
}
virtual void PutExtension(const std::string& id,
const base::FilePath& file_path,
const std::string& version,
const PutExtensionCallback& callback) OVERRIDE {
callback.Run(file_path, true);
}
private:
friend struct DefaultSingletonTraits<ExtensionCacheNullImpl>;
ExtensionCacheNullImpl() {}
virtual ~ExtensionCacheNullImpl() {}
};
#endif // !OS_CHROMEOS
static ExtensionCache* g_extension_cache_override = NULL;
} // namespace
// static
ExtensionCache* ExtensionCache::GetInstance() {
if (g_extension_cache_override) {
return g_extension_cache_override;
} else {
#if defined(OS_CHROMEOS)
return ExtensionCacheImpl::GetInstance();
#else
return ExtensionCacheNullImpl::GetInstance();
#endif
}
}
// static
ExtensionCache* ExtensionCache::SetForTesting(ExtensionCache* cache) {
ExtensionCache* temp = g_extension_cache_override;
g_extension_cache_override = cache;
return temp;
}
} // namespace extensions
|
