Service Workers: Clean up cpplint.py warnings

content/browser/service_worker/service_worker_context_unittest.cc

Index: content/browser/service_worker/service_worker_context_unittest.cc
diff --git a/content/browser/service_worker/service_worker_context_unittest.cc b/content/browser/service_worker/service_worker_context_unittest.cc
index e386882c1d007a2e5f2e9da9219d01f4f21496ec..16889a6a3f0c641eda11fc35d09d3f329ed60e5b 100644
--- a/content/browser/service_worker/service_worker_context_unittest.cc
+++ b/content/browser/service_worker/service_worker_context_unittest.cc
@@ -85,7 +85,7 @@ void ExpectRegisteredWorkers(
 
 class RejectInstallTestHelper : public EmbeddedWorkerTestHelper {
  public:
-  RejectInstallTestHelper(int mock_render_process_id)
+  explicit RejectInstallTestHelper(int mock_render_process_id)
       : EmbeddedWorkerTestHelper(mock_render_process_id) {}
 
   virtual void OnInstallEvent(int embedded_worker_id,
@@ -100,7 +100,7 @@ class RejectInstallTestHelper : public EmbeddedWorkerTestHelper {
 
 class RejectActivateTestHelper : public EmbeddedWorkerTestHelper {
  public:
-  RejectActivateTestHelper(int mock_render_process_id)
+  explicit RejectActivateTestHelper(int mock_render_process_id)
       : EmbeddedWorkerTestHelper(mock_render_process_id) {}
 
   virtual void OnActivateEvent(int embedded_worker_id,