Cleanup: Style fixes in extensions/browser

extensions/browser/test_extensions_browser_client.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_
 #define EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/extensions_browser_client.h"
 
 namespace extensions {
 
 // A simplified ExtensionsBrowserClient for a single normal browser context and
 // an optional incognito browser context associated with it. A test that uses
 // this class should call ExtensionsBrowserClient::Set() with its instance.
 class TestExtensionsBrowserClient : public ExtensionsBrowserClient {
  public:
   // |context| is required and must not be an incognito context.
-  TestExtensionsBrowserClient(content::BrowserContext* main_context);
+  explicit TestExtensionsBrowserClient(content::BrowserContext* main_context);
   virtual ~TestExtensionsBrowserClient();
 
   // Associates an incognito context with |main_context_|.
   void SetIncognitoContext(content::BrowserContext* incognito_context);
 
   // ExtensionsBrowserClient overrides:
   virtual bool IsShuttingDown() OVERRIDE;
   virtual bool AreExtensionsDisabled(const base::CommandLine& command_line,
                                      content::BrowserContext* context) OVERRIDE;
   virtual bool IsValidContext(content::BrowserContext* context) OVERRIDE;
@@ skipping 49 matching lines @@
  private:
   content::BrowserContext* main_context_;       // Not owned.
   content::BrowserContext* incognito_context_;  // Not owned, defaults to NULL.
 
   DISALLOW_COPY_AND_ASSIGN(TestExtensionsBrowserClient);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_TEST_EXTENSIONS_BROWSER_CLIENT_H_