Style cleanup in preparation for auto-linting base/.

base/observer_list_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop.h"
 #include "base/observer_list.h"
 #include "base/observer_list_threadsafe.h"
 #include "base/platform_thread.h"
 #include "base/ref_counted.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 44 matching lines @@
   virtual void Observe(int x) {
     list_->RemoveObserver(doomed_);
   }
  private:
   ObserverListThreadSafe<Foo>* list_;
   Foo* doomed_;
 };
 
 class AddInObserve : public Foo {
  public:
-  AddInObserve(ObserverList<Foo>* observer_list)
+  explicit AddInObserve(ObserverList<Foo>* observer_list)
       : added(false),
         observer_list(observer_list),
         adder(1) {
   }
   virtual void Observe(int x) {
     if (!added) {
       added = true;
       observer_list->AddObserver(&adder);
     }
   }
@@ skipping 221 matching lines @@
 
   EXPECT_TRUE(b.added);
   // B's adder should not have been notified because it was added during
   // notificaiton.
   EXPECT_EQ(0, b.adder.total);
 
   // Notify again to make sure b's adder is notified.
   FOR_EACH_OBSERVER(Foo, observer_list, Observe(1));
   EXPECT_EQ(1, b.adder.total);
 }