Revert of Simplify BrowserContext by removing redundant methods.

content/browser/cache_storage/cache_storage_cache_unittest.cc

Index: content/browser/cache_storage/cache_storage_cache_unittest.cc
diff --git a/content/browser/cache_storage/cache_storage_cache_unittest.cc b/content/browser/cache_storage/cache_storage_cache_unittest.cc
index 059702509cac8e22291e5132637ffbc18eb70ef3..5417f2a525f93d25a050394070153599a377c6e2 100644
--- a/content/browser/cache_storage/cache_storage_cache_unittest.cc
+++ b/content/browser/cache_storage/cache_storage_cache_unittest.cc
@@ -24,7 +24,6 @@
 #include "content/common/cache_storage/cache_storage_types.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/browser/browser_thread.h"
-#include "content/public/browser/storage_partition.h"
 #include "content/public/common/referrer.h"
 #include "content/public/test/mock_special_storage_policy.h"
 #include "content/public/test/test_browser_context.h"
@@ -306,8 +305,7 @@
         "blob", CreateMockBlobProtocolHandler(blob_storage_context->context()));
 
     net::URLRequestContext* url_request_context =
-        BrowserContext::GetDefaultStoragePartition(&browser_context_)->
-            GetURLRequestContext()->GetURLRequestContext();
+        browser_context_.GetRequestContext()->GetURLRequestContext();
 
     url_request_context->set_job_factory(url_request_job_factory_.get());
 
@@ -315,9 +313,8 @@
 
     cache_ = make_scoped_refptr(new TestCacheStorageCache(
         GURL(kOrigin), kCacheName, temp_dir_.path(),
-        BrowserContext::GetDefaultStoragePartition(&browser_context_)->
-            GetURLRequestContext(),
-        quota_manager_proxy_, blob_storage_context->context()->AsWeakPtr()));
+        browser_context_.GetRequestContext(), quota_manager_proxy_,
+        blob_storage_context->context()->AsWeakPtr()));
   }
 
   void TearDown() override {
@@ -600,8 +597,8 @@
 
  protected:
   base::ScopedTempDir temp_dir_;
+  TestBrowserContext browser_context_;
   TestBrowserThreadBundle browser_thread_bundle_;
-  TestBrowserContext browser_context_;
   std::unique_ptr<net::URLRequestJobFactoryImpl> url_request_job_factory_;
   scoped_refptr<MockSpecialStoragePolicy> quota_policy_;
   scoped_refptr<MockQuotaManager> mock_quota_manager_;