Switch content tests to use BrowserThreadImpl directly.

content/browser/in_process_webkit/dom_storage_unittest.cc

Index: content/browser/in_process_webkit/dom_storage_unittest.cc
diff --git a/content/browser/in_process_webkit/dom_storage_unittest.cc b/content/browser/in_process_webkit/dom_storage_unittest.cc
index d3438c51f0405e0e4b9d9a8eb1cc4f0d217c7beb..7f37f02ceea5d56ae7bbe35714af6ea34c32879b 100644
--- a/content/browser/in_process_webkit/dom_storage_unittest.cc
+++ b/content/browser/in_process_webkit/dom_storage_unittest.cc
@@ -4,12 +4,14 @@
 
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "content/browser/browser_thread_impl.h"
 #include "content/browser/in_process_webkit/webkit_context.h"
 #include "content/test/test_browser_context.h"
-#include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/quota/mock_special_storage_policy.h"
 
+using content::BrowserThreadImpl;
+
 class DOMStorageTest : public testing::Test {
  public:
   DOMStorageTest()
@@ -21,7 +23,7 @@ class DOMStorageTest : public testing::Test {
   MessageLoop message_loop_;
 
  private:
-  content::TestBrowserThread webkit_thread_;
+  BrowserThreadImpl webkit_thread_;
 };
 
 TEST_F(DOMStorageTest, SessionOnly) {