Move some blob tests next to the files they cover.

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index c3f0ecc13d1badf81e0ca84bbb317e7087912ee5..d036482f2e2b4f03188a32cc53a2e72b3be5c712 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -1025,16 +1025,10 @@ test("content_unittests") {
     "../browser/background_sync/background_sync_manager_unittest.cc",
     "../browser/background_sync/background_sync_network_observer_unittest.cc",
     "../browser/background_sync/background_sync_service_impl_unittest.cc",
-    "../browser/blob_storage/blob_data_builder_unittest.cc",
     "../browser/blob_storage/blob_dispatcher_host_unittest.cc",
-    "../browser/blob_storage/blob_flattener_unittest.cc",
-    "../browser/blob_storage/blob_memory_controller_unittest.cc",
     "../browser/blob_storage/blob_reader_unittest.cc",
-    "../browser/blob_storage/blob_slice_unittest.cc",
     "../browser/blob_storage/blob_storage_context_unittest.cc",
-    "../browser/blob_storage/blob_storage_registry_unittest.cc",
     "../browser/blob_storage/blob_transport_host_unittest.cc",
-    "../browser/blob_storage/blob_transport_request_builder_unittest.cc",
     "../browser/blob_storage/blob_url_request_job_unittest.cc",
     "../browser/bluetooth/bluetooth_allowed_devices_unittest.cc",
     "../browser/bluetooth/bluetooth_blocklist_unittest.cc",