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

extensions/browser/pending_extension_manager.cc

Index: extensions/browser/pending_extension_manager.cc
diff --git a/extensions/browser/pending_extension_manager.cc b/extensions/browser/pending_extension_manager.cc
index d16b92b9dfb7856109a408de3eee8becce1f9414..62d937384ac882e6d6301cf3b62bb6e01ec1f70b 100644
--- a/extensions/browser/pending_extension_manager.cc
+++ b/extensions/browser/pending_extension_manager.cc
@@ -109,9 +109,16 @@ bool PendingExtensionManager::AddFromSync(
   const Manifest::Location kSyncLocation = Manifest::INTERNAL;
   const bool kMarkAcknowledged = false;
 
-  return AddExtensionImpl(id, update_url, Version(), should_allow_install,
-                          kIsFromSync, install_silently, kSyncLocation,
-                          Extension::NO_FLAGS, kMarkAcknowledged);
+  return AddExtensionImpl(id,
+                          std::string(),
+                          update_url,
+                          Version(),
+                          should_allow_install,
+                          kIsFromSync,
+                          install_silently,
+                          kSyncLocation,
+                          Extension::NO_FLAGS,
+                          kMarkAcknowledged);
 }
 
 bool PendingExtensionManager::AddFromExtensionImport(
@@ -131,13 +138,21 @@ bool PendingExtensionManager::AddFromExtensionImport(
   const Manifest::Location kManifestLocation = Manifest::INTERNAL;
   const bool kMarkAcknowledged = false;
 
-  return AddExtensionImpl(id, update_url, Version(), should_allow_install,
-                          kIsFromSync, kInstallSilently, kManifestLocation,
-                          Extension::NO_FLAGS, kMarkAcknowledged);
+  return AddExtensionImpl(id,
+                          std::string(),
+                          update_url,
+                          Version(),
+                          should_allow_install,
+                          kIsFromSync,
+                          kInstallSilently,
+                          kManifestLocation,
+                          Extension::NO_FLAGS,
+                          kMarkAcknowledged);
 }
 
 bool PendingExtensionManager::AddFromExternalUpdateUrl(
     const std::string& id,
+    const std::string& install_parameter,
     const GURL& update_url,
     Manifest::Location location,
     int creation_flags,
@@ -148,9 +163,8 @@ bool PendingExtensionManager::AddFromExternalUpdateUrl(
   const bool kInstallSilently = true;
 
   const Extension* extension = service_.GetInstalledExtension(id);
-  if (extension &&
-      location == Manifest::GetHigherPriorityLocation(location,
-                                                       extension->location())) {
+  if (extension && location == Manifest::GetHigherPriorityLocation(
+                                   location, extension->location())) {
     // If the new location has higher priority than the location of an existing
     // extension, let the update process overwrite the existing extension.
   } else {
@@ -164,9 +178,16 @@ bool PendingExtensionManager::AddFromExternalUpdateUrl(
     }
   }
 
-  return AddExtensionImpl(id, update_url, Version(), &AlwaysInstall,
-                          kIsFromSync, kInstallSilently,
-                          location, creation_flags, mark_acknowledged);
+  return AddExtensionImpl(id,
+                          install_parameter,
+                          update_url,
+                          Version(),
+                          &AlwaysInstall,
+                          kIsFromSync,
+                          kInstallSilently,
+                          location,
+                          creation_flags,
+                          mark_acknowledged);
 }
 
 
@@ -184,16 +205,16 @@ bool PendingExtensionManager::AddFromExternalFile(
   bool kIsFromSync = false;
   bool kInstallSilently = true;
 
-  return AddExtensionImpl(
-      id,
-      kUpdateUrl,
-      version,
-      &AlwaysInstall,
-      kIsFromSync,
-      kInstallSilently,
-      install_source,
-      creation_flags,
-      mark_acknowledged);
+  return AddExtensionImpl(id,
+                          std::string(),
+                          kUpdateUrl,
+                          version,
+                          &AlwaysInstall,
+                          kIsFromSync,
+                          kInstallSilently,
+                          install_source,
+                          creation_flags,
+                          mark_acknowledged);
 }
 
 void PendingExtensionManager::GetPendingIdsForUpdateCheck(
@@ -217,6 +238,7 @@ void PendingExtensionManager::GetPendingIdsForUpdateCheck(
 
 bool PendingExtensionManager::AddExtensionImpl(
     const std::string& id,
+    const std::string& install_parameter,
     const GURL& update_url,
     const Version& version,
     PendingExtensionInfo::ShouldAllowInstallPredicate should_allow_install,
@@ -228,6 +250,7 @@ bool PendingExtensionManager::AddExtensionImpl(
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   PendingExtensionInfo info(id,
+                            install_parameter,
                             update_url,
                             version,
                             should_allow_install,