Convert SandboxPrioritizedOriginDatabase to unique_ptr

In ObfuscatedFileUtil::InitOriginDatabase method

Bug: N/A
Change-Id: I630c0e40a56db336c12f80c7869fd48a6fe6f451
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627136
Auto-Submit: Austin Sullivan <asully@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843201}

storage/browser/file_system/obfuscated_file_util.cc

@@ -1348,18 +1348,19 @@ bool ObfuscatedFileUtil::InitOriginDatabase(const url::Origin& origin_hint,
     }
   }
 
-  SandboxPrioritizedOriginDatabase* prioritized_origin_database =
-      new SandboxPrioritizedOriginDatabase(file_system_directory_,
-                                           env_override_);
-  origin_database_.reset(prioritized_origin_database);
-
-  if (!origin_hint.opaque() || !HasIsolatedStorage(origin_hint))
-    return true;
+  std::unique_ptr<SandboxPrioritizedOriginDatabase>
+      prioritized_origin_database =
+          std::make_unique<SandboxPrioritizedOriginDatabase>(
+              file_system_directory_, env_override_);
 
+  if (origin_hint.opaque() && HasIsolatedStorage(origin_hint)) {
     const std::string isolated_origin_string =
         GetIdentifierFromOrigin(origin_hint);
+    prioritized_origin_database->InitializePrimaryOrigin(
+        isolated_origin_string);
+  }
 
-  prioritized_origin_database->InitializePrimaryOrigin(isolated_origin_string);
+  origin_database_ = std::move(prioritized_origin_database);
 
   return true;
 }