ExtensionsTest: Move initialization to SetUp and avoid potential UAF.

extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc

Index: extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc
diff --git a/extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc b/extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc
index 68f9a1d7dda3dd292d86a2e626279302bb3bbf16..ffbfe3056647ee3b434b407ddc24c929a73328cd 100644
--- a/extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc
+++ b/extensions/browser/api/bluetooth/bluetooth_event_router_unittest.cc
@@ -8,6 +8,7 @@
 #include <string>
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ -42,8 +43,12 @@ class BluetoothEventRouterTest : public ExtensionsTest {
  public:
   BluetoothEventRouterTest()
       : ui_thread_(content::BrowserThread::UI, &message_loop_),
-        mock_adapter_(new testing::StrictMock<device::MockBluetoothAdapter>()),
-        router_(new BluetoothEventRouter(browser_context())) {
+        mock_adapter_(new testing::StrictMock<device::MockBluetoothAdapter>()) {

[karandeepb, 2017/04/06 03:29:24]

Seems this is leaked. Intentional?

+  }
+
+  void SetUp() override {
+    ExtensionsTest::SetUp();
+    router_ = base::MakeUnique<BluetoothEventRouter>(browser_context());
     router_->SetAdapterForTest(mock_adapter_);
   }