Implement the ability to obliterate a storage partition from disk.

On the uninstall of an extension with isolated storage, we want to delete
all the data for the extension from disk as soon as possible. Because we
cannot know when various objects with state on disk 
(eg., FileSystemContext) have all been deleted, we do a best-effort delete
for any directory that we know isn't being used.

The way this gets projected into the content modulue is that each extension
defines one partition_domain. If an extension has a <webview> tag, it will
also have multiple StoragePartitions, each with a different partition_name.
If it doesn't have a <webview> tag, the partition_name is considered empty
which yields the default partition. The default partition, and all webview
partitions are peers inside the partition_domain's root directory.

This CL introduces a function that allows us to delete partiton domain.
Special care is taken to not accidentally instantiate a StoragePartition for
the domain if none current exists. This is necessary to allow us to actually
delete the whole partition domain directory.

(Patch by ajwong@chromium.org)

BUG=85127


Review URL: https://chromiumcodereview.appspot.com/11280030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168405 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 85 insertions, 35 deletions

diff --git a/content/browser/storage_partition_impl.cc b/content/browser/storage_partition_impl.cc
index da17ff1..a3eafab 100644
--- a/content/browser/storage_partition_impl.cc
+++ b/content/browser/storage_partition_impl.cc
@@ -8,6 +8,7 @@
 #include "content/browser/fileapi/browser_file_system_helper.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/dom_storage_context.h"
 #include "content/public/browser/indexed_db_context.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_errors.h"
@@ -15,17 +16,38 @@
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_context.h"
 #include "webkit/database/database_tracker.h"
-#include "webkit/database/database_util.h"
+#include "webkit/dom_storage/dom_storage_types.h"
 #include "webkit/quota/quota_manager.h"
 
 namespace content {
 
 namespace {
 
-void ClearDataOnIOThread(
+void DoNothingStatusCallback(quota::QuotaStatusCode status) {
+  // Do nothing.
+}
+
+void ClearQuotaManagedOriginsOnIOThread(
+    const scoped_refptr<quota::QuotaManager>& quota_manager,
+    const std::set<GURL>& origins,
+    quota::StorageType type) {
+  // The QuotaManager manages all storage other than cookies, LocalStorage,
+  // and SessionStorage. This loop wipes out most HTML5 storage for the given
+  // origins.
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  std::set<GURL>::const_iterator origin;
+  for (std::set<GURL>::const_iterator origin = origins.begin();
+       origin != origins.end(); ++origin) {
+    quota_manager->DeleteOriginData(*origin, type,
+                                    quota::QuotaClient::kAllClientsMask,
+                                    base::Bind(&DoNothingStatusCallback));
+  }
+}
+
+void ClearOriginOnIOThread(
     const GURL& storage_origin,
     const scoped_refptr<net::URLRequestContextGetter>& request_context,
-    const scoped_refptr<ChromeAppCacheService>& appcache_service) {
+    const scoped_refptr<quota::QuotaManager>& quota_manager) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   // Handle the cookies.
@@ -36,26 +58,54 @@ void ClearDataOnIOThread(
     cookie_monster->DeleteAllForHostAsync(
         storage_origin, net::CookieMonster::DeleteCallback());
 
-  // Clear out appcache.
-  appcache_service->DeleteAppCachesForOrigin(storage_origin,
-                                             net::CompletionCallback());
+  // Handle all HTML5 storage other than DOMStorageContext.
+  std::set<GURL> origins;
+  origins.insert(storage_origin);
+  ClearQuotaManagedOriginsOnIOThread(quota_manager, origins,
+                                     quota::kStorageTypePersistent);
+  ClearQuotaManagedOriginsOnIOThread(quota_manager, origins,
+                                     quota::kStorageTypeTemporary);
 }
 
-void ClearDataOnFileThread(
-    const GURL& storage_origin,
-    string16 origin_id,
-    const scoped_refptr<webkit_database::DatabaseTracker> &database_tracker,
-    const scoped_refptr<fileapi::FileSystemContext>& file_system_context) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+void ClearAllDataOnIOThread(
+    const scoped_refptr<net::URLRequestContextGetter>& request_context,
+    const scoped_refptr<quota::QuotaManager>& quota_manager) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
-  // Clear out the HTML5 filesystem.
-  file_system_context->DeleteDataForOriginOnFileThread(storage_origin);
+  // Handle the cookies.
+  net::CookieMonster* cookie_monster =
+      request_context->GetURLRequestContext()->cookie_store()->
+          GetCookieMonster();
+  if (cookie_monster)
+    cookie_monster->DeleteAllAsync(net::CookieMonster::DeleteCallback());
+
+  // Handle all HTML5 storage other than DOMStorageContext.
+  quota_manager->GetOriginsModifiedSince(
+      quota::kStorageTypePersistent, base::Time(),
+      base::Bind(&ClearQuotaManagedOriginsOnIOThread, quota_manager));
+  quota_manager->GetOriginsModifiedSince(
+      quota::kStorageTypeTemporary, base::Time(),
+      base::Bind(&ClearQuotaManagedOriginsOnIOThread, quota_manager));
+}
 
-  // Clear out the database tracker.  We just let this run until completion
-  // without notification.
-  int rv = database_tracker->DeleteDataForOrigin(
-      origin_id, net::CompletionCallback());
-  DCHECK(rv == net::OK || rv == net::ERR_IO_PENDING);
+void OnLocalStorageUsageInfo(
+    const scoped_refptr<DOMStorageContextImpl>& dom_storage_context,
+    const std::vector<dom_storage::LocalStorageUsageInfo>& infos) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  for (size_t i = 0; i < infos.size(); ++i) {
+    dom_storage_context->DeleteLocalStorage(infos[i].origin);
+  }
+}
+
+void OnSessionStorageUsageInfo(
+    const scoped_refptr<DOMStorageContextImpl>& dom_storage_context,
+    const std::vector<dom_storage::SessionStorageUsageInfo>& infos) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  for (size_t i = 0; i < infos.size(); ++i) {
+    dom_storage_context->DeleteSessionStorage(infos[i]);
+  }
 }
 
 }  // namespace
@@ -192,28 +242,28 @@ void StoragePartitionImpl::AsyncClearDataForOrigin(
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
-      base::Bind(&ClearDataOnIOThread,
+      base::Bind(&ClearOriginOnIOThread,
                  storage_origin,
                  make_scoped_refptr(request_context_getter),
-                 appcache_service_));
-
-  string16 origin_id =
-      webkit_database::DatabaseUtil::GetOriginIdentifier(storage_origin);
-  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
-                          base::Bind(&ClearDataOnFileThread,
-                                     storage_origin,
-                                     origin_id,
-                                     database_tracker_,
-                                     filesystem_context_));
+                 quota_manager_));
 
   GetDOMStorageContext()->DeleteLocalStorage(storage_origin);
+}
 
+void StoragePartitionImpl::AsyncClearAllData() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // We ignore the media request context because it shares the same cookie store
+  // as the main request context.
   BrowserThread::PostTask(
-      BrowserThread::WEBKIT_DEPRECATED, FROM_HERE,
-      base::Bind(
-          &IndexedDBContext::DeleteForOrigin,
-          indexed_db_context_,
-          storage_origin));
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&ClearAllDataOnIOThread, url_request_context_,
+                 quota_manager_));
+
+  dom_storage_context_->GetLocalStorageUsage(
+      base::Bind(&OnLocalStorageUsageInfo, dom_storage_context_));
+  dom_storage_context_->GetSessionStorageUsage(
+      base::Bind(&OnSessionStorageUsageInfo, dom_storage_context_));
 }
 
 void StoragePartitionImpl::SetURLRequestContext(