Move a couple of blob tests next to the files they cover.

storage/browser/BUILD.gn

Index: storage/browser/BUILD.gn
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index e1880c7d29b13813814cea57f5de815f5001162e..4fdb007f1debdfe31ef5f825641ae0bf9f97669c 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -229,10 +229,12 @@ test("storage_unittests") {
     "blob/blob_data_builder_unittest.cc",
     "blob/blob_flattener_unittest.cc",
     "blob/blob_memory_controller_unittest.cc",
+    "blob/blob_reader_unittest.cc",
     "blob/blob_slice_unittest.cc",
     "blob/blob_storage_context_unittest.cc",
     "blob/blob_storage_registry_unittest.cc",
     "blob/blob_transport_request_builder_unittest.cc",
+    "blob/blob_url_request_job_unittest.cc",
     "database/database_quota_client_unittest.cc",
     "database/database_util_unittest.cc",
     "database/databases_table_unittest.cc",
@@ -252,6 +254,7 @@ test("storage_unittests") {
 
   deps = [
     ":browser",
+    ":test_support",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//net:test_support",
@@ -260,3 +263,27 @@ test("storage_unittests") {
     "//third_party/leveldatabase",
   ]
 }
+
+static_library("test_support") {
+  testonly = true
+
+  sources = [
+    "test/async_file_test_helper.cc",
+    "test/async_file_test_helper.h",
+    "test/mock_special_storage_policy.cc",
+    "test/mock_special_storage_policy.h",
+    "test/test_file_system_backend.cc",
+    "test/test_file_system_backend.h",
+    "test/test_file_system_context.cc",
+    "test/test_file_system_context.h",
+    "test/test_file_system_options.cc",
+    "test/test_file_system_options.h",
+  ]
+
+  deps = [
+    ":browser",
+    "//base/test:test_support",
+    "//net:test_support",
+    "//testing/gtest",
+  ]
+}