Introduce an extension parameter which is used to customize the extension. It's available for exter…

chrome/browser/extensions/external_registry_loader_win.cc

 // Copyright (c) 2012 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/external_registry_loader_win.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_handle.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "base/win/registry.h"
 #include "chrome/browser/extensions/external_provider_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/common/extension.h"
 
 using content::BrowserThread;
 
 namespace {
 
 // The Registry subkey that contains information about external extensions.
 const char kRegistryExtensions[] = "Software\\Google\\Chrome\\Extensions";
 
+// Registry value of the key that defines the installation parameter.
+const wchar_t kRegistryExtensionInstallParam[] = L"install_parameter";
+
 // Registry value of the key that defines the path to the .crx file.
 const wchar_t kRegistryExtensionPath[] = L"path";
 
 // Registry value of that key that defines the current version of the .crx file.
 const wchar_t kRegistryExtensionVersion[] = L"version";
 
 // Registry value of the key that defines an external update URL.
 const wchar_t kRegistryExtensionUpdateUrl[] = L"update_url";
 
 bool CanOpenFileForReading(const base::FilePath& path) {
@@ skipping 48 matching lines @@
     }
 
     std::string id = base::UTF16ToASCII(*it);
     StringToLowerASCII(&id);
     if (!Extension::IdIsValid(id)) {
       LOG(ERROR) << "Invalid id value " << id
                  << " for key " << key_path << ".";
       continue;
     }
 
+    base::string16 extension_dist_id;
+    if (key.ReadValue(kRegistryExtensionInstallParam, &extension_dist_id) ==
+        ERROR_SUCCESS) {
+      prefs->SetString(id + "." + ExternalProviderImpl::kInstallParam,
+                       base::UTF16ToASCII(extension_dist_id));
+    }
+
     // If there is an update URL present, copy it to prefs and ignore
     // path and version keys for this entry.
     base::string16 extension_update_url;
     if (key.ReadValue(kRegistryExtensionUpdateUrl, &extension_update_url)
         == ERROR_SUCCESS) {
       prefs->SetString(
           id + "." + ExternalProviderImpl::kExternalUpdateUrl,
           base::UTF16ToASCII(extension_update_url));
       continue;
     }
@@ skipping 56 matching lines @@
 
   prefs_.reset(prefs.release());
   HISTOGRAM_TIMES("Extensions.ExternalRegistryLoaderWin",
                   base::TimeTicks::Now() - start_time);
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&ExternalRegistryLoader::LoadFinished, this));
 }
 
 }  // namespace extensions