Add 'tor' partition with domain-partitioned storage

Fix #468

brave/browser/brave_browser_context.cc

@@ -271,6 +271,10 @@ bool BraveBrowserContext::HasParentContext() {
   return has_parent_;
 }
 
+bool BraveBrowserContext::IsTorContext() {
+  return partition() == "tor";
+}
+
 BraveBrowserContext* BraveBrowserContext::original_context() {
   if (original_context_) {
     return original_context_;

brave/browser/brave_browser_context.h

@@ -67,6 +67,8 @@ class BraveBrowserContext : public Profile {
 
   bool HasParentContext();
 
+  bool IsTorContext();
+
   // content::BrowserContext:
   content::PermissionManager* GetPermissionManager() override;
   content::BackgroundFetchDelegate* GetBackgroundFetchDelegate() override;

brave/browser/brave_content_browser_client.cc

@@ -14,6 +14,7 @@
 #include "base/lazy_instance.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
+#include "brave/browser/brave_browser_context.h"
 #include "brave/browser/notifications/platform_notification_service_impl.h"
 #include "brave/browser/password_manager/brave_password_manager_client.h"
 #include "brave/grit/brave_resources.h"
@@ -277,6 +278,13 @@ void BraveContentBrowserClient::GetStoragePartitionConfigForSite(
   }
 #endif
 
+  BraveBrowserContext* profile =
+      BraveBrowserContext::FromBrowserContext(browser_context);
+  if (profile->IsTorContext()) {
+      *in_memory = profile->IsOffTheRecord();
+      *partition_domain = site.host();
+  }
+
   // Assert that if |can_be_default| is false, the code above must have found a
   // non-default partition.  If this fails, the caller has a serious logic
   // error about which StoragePartition they expect to be in and it is not