Use string16 for cache_name in the back end of CacheStorage.

content/browser/cache_storage/cache_storage_unittest.cc

Index: content/browser/cache_storage/cache_storage_unittest.cc
diff --git a/content/browser/cache_storage/cache_storage_unittest.cc b/content/browser/cache_storage/cache_storage_unittest.cc
index faf0eb10635b87b59c3f83c1088bd4c1a6452f5e..764b75f17273cce36ab346a6711da0fe56e7f7e5 100644
--- a/content/browser/cache_storage/cache_storage_unittest.cc
+++ b/content/browser/cache_storage/cache_storage_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -73,8 +74,9 @@ class CacheStorageTest : public testing::Test {
   bool OpenCache(const std::string& cache_name) {
     bool callback_called = false;
     test_cache_storage_->OpenCache(
-        cache_name, base::Bind(&CacheStorageTest::OpenCacheCallback,
-                               base::Unretained(this), &callback_called));
+        base::UTF8ToUTF16(cache_name),
+        base::Bind(&CacheStorageTest::OpenCacheCallback, base::Unretained(this),
+                   &callback_called));
     base::RunLoop().RunUntilIdle();
     EXPECT_TRUE(callback_called);
     return callback_error_ == CACHE_STORAGE_OK;