Redo the Storage Partition directory layout to support guest tags and origin based partitions.

content/browser/storage_partition_impl.cc

Index: content/browser/storage_partition_impl.cc
diff --git a/content/browser/storage_partition_impl.cc b/content/browser/storage_partition_impl.cc
index e906a6acb8dc22a68ba429db5a1370496b5a01d4..69e01004ae01596164f782c0398c2d9694d4b489 100644
--- a/content/browser/storage_partition_impl.cc
+++ b/content/browser/storage_partition_impl.cc
@@ -12,6 +12,45 @@
 
 namespace content {
 
+namespace {
+
+// These constants are used to create the directory structure under the profile
+// where renderers with a non-default storage partition keep their persistent
+// state. This will contain a set of directories that partially mirror the
+// directory structure of BrowserContext::GetPath().
+//
+// The kStoragePartitionDirname is contains an extensions directory which is
+// further partitioned by extension id, followed by another level of directories
+// for the "default" extension storage partition and one directory for each
+// persistent partition used by an extension's browser tags. Example:
+//
+//   {kStoragePartitionDirname}/extensions/ABCDEF/default
+//   {kStoragePartitionDirname}/extensions/ABCDEF/{hash(guest partition)}
+//
+// The code in GetPartitionPath() constructs these path names.
+const FilePath::CharType kStoragePartitionDirname[] =
+    FILE_PATH_LITERAL("Storage Partitions");
+const char kExtensionsDirname[] = "extensions";
+const char kDefaultPartitionDirname[] = "default";
+
+}  // namespace
+
+// static
+FilePath StoragePartition::GetPartitionPath(const FilePath& profile_path,
+                                            const std::string& partition_id) {
+  if (partition_id.empty()) {
+    // The default profile just sits inside the top-level profile directory.
+    return profile_path;
+  }
+
+  // TODO(ajwong): This should check we create a valid path name.
+  CHECK(IsStringASCII(partition_id));
+  return profile_path.Append(kStoragePartitionDirname)
+      .AppendASCII(kExtensionsDirname)
+      .AppendASCII(partition_id)
+      .AppendASCII(kDefaultPartitionDirname);
+}
+
 StoragePartitionImpl::StoragePartitionImpl(
     const FilePath& partition_path,
     quota::QuotaManager* quota_manager,
@@ -47,12 +86,17 @@ StoragePartitionImpl::~StoragePartitionImpl() {
 // need 3 pieces of info from it.
 StoragePartitionImpl* StoragePartitionImpl::Create(
     BrowserContext* context,
-    const FilePath& partition_path) {
+    const std::string& partition_id,
+    const FilePath& profile_path) {
   // Ensure that these methods are called on the UI thread, except for
   // unittests where a UI thread might not have been created.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
          !BrowserThread::IsMessageLoopValid(BrowserThread::UI));
 
+  FilePath partition_path =
+      StoragePartition::GetPartitionPath(context->GetPath(),
+                                         partition_id);
+
   // All of the clients have to be created and registered with the
   // QuotaManager prior to the QuotaManger being used. We do them
   // all together here prior to handing out a reference to anything
@@ -99,6 +143,10 @@ StoragePartitionImpl* StoragePartitionImpl::Create(
                                   indexed_db_context);
 }
 
+FilePath StoragePartitionImpl::GetPath() {
+  return partition_path_;
+}
+
 quota::QuotaManager* StoragePartitionImpl::GetQuotaManager() {
   return quota_manager_;
 }