Move LazyBackgroundTaskQueueTest into extensions_unittests

extensions/browser/extensions_test.h

Index: extensions/browser/extensions_test.h
diff --git a/extensions/browser/extensions_test.h b/extensions/browser/extensions_test.h
index ed16fe9c184abc90a974215111da7f04f7d7a28e..a8ab790cf122c5f69ec25f3a928d7f3ce460c2b8 100644
--- a/extensions/browser/extensions_test.h
+++ b/extensions/browser/extensions_test.h
@@ -5,6 +5,7 @@
 #ifndef EXTENSIONS_BROWSER_EXTENSIONS_TEST_H_
 #define EXTENSIONS_BROWSER_EXTENSIONS_TEST_H_
 
+#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -38,6 +39,10 @@ class ExtensionsTest : public testing::Test {
     return extensions_browser_client_.get();
   }
 
+  // testing::Test overrides:
+  virtual void SetUp() OVERRIDE;
+  virtual void TearDown() OVERRIDE;
+
  private:
   scoped_ptr<content::ContentClient> content_client_;
   scoped_ptr<content::ContentBrowserClient> content_browser_client_;