Convert //extensions/browser from scoped_ptr to std::unique_ptr

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 e930421a1e1c7fda437e560af79621c16643a393..f4462e2681c8b0d0fae786e59861a06defc1d816 100644
--- a/extensions/browser/extensions_test.h
+++ b/extensions/browser/extensions_test.h
@@ -5,9 +5,10 @@
 #ifndef EXTENSIONS_BROWSER_EXTENSIONS_TEST_H_
 #define EXTENSIONS_BROWSER_EXTENSIONS_TEST_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "content/public/test/test_renderer_host.h"
 #include "extensions/browser/mock_extension_system.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -52,11 +53,11 @@ class ExtensionsTest : public testing::Test {
 
  private:
   // TODO(yoz): Add a NotificationService here; it's used widely enough.
-  scoped_ptr<content::ContentClient> content_client_;
-  scoped_ptr<content::ContentUtilityClient> content_utility_client_;
-  scoped_ptr<content::ContentBrowserClient> content_browser_client_;
-  scoped_ptr<content::BrowserContext> browser_context_;
-  scoped_ptr<TestExtensionsBrowserClient> extensions_browser_client_;
+  std::unique_ptr<content::ContentClient> content_client_;
+  std::unique_ptr<content::ContentUtilityClient> content_utility_client_;
+  std::unique_ptr<content::ContentBrowserClient> content_browser_client_;
+  std::unique_ptr<content::BrowserContext> browser_context_;
+  std::unique_ptr<TestExtensionsBrowserClient> extensions_browser_client_;
 
   // The existence of this object enables tests via
   // RenderViewHostTester.