Convert //ios from scoped_ptr to std::unique_ptr.

ios/public/provider/chrome/browser/test_chrome_browser_provider.h

Index: ios/public/provider/chrome/browser/test_chrome_browser_provider.h
diff --git a/ios/public/provider/chrome/browser/test_chrome_browser_provider.h b/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
index 863121f36b500fef6b22ad1436fd7287dd8ac5ad..760d314a116c318abf342420ac5c5085b4b050db 100644
--- a/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
+++ b/ios/public/provider/chrome/browser/test_chrome_browser_provider.h
@@ -5,8 +5,9 @@
 #ifndef IOS_PUBLIC_PROVIDER_CHROME_BROWSER_TEST_CHROME_BROWSER_PROVIDER_H_
 #define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_TEST_CHROME_BROWSER_PROVIDER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
 class FakeProfileOAuth2TokenServiceIOSProvider;
@@ -30,10 +31,11 @@ class TestChromeBrowserProvider : public ChromeBrowserProvider {
   UpdatableResourceProvider* GetUpdatableResourceProvider() override;
 
  private:
-  scoped_ptr<FakeProfileOAuth2TokenServiceIOSProvider>
+  std::unique_ptr<FakeProfileOAuth2TokenServiceIOSProvider>
       oauth2_token_service_provider_;
-  scoped_ptr<ChromeIdentityService> chrome_identity_service_;
-  scoped_ptr<TestUpdatableResourceProvider> test_updatable_resource_provider_;
+  std::unique_ptr<ChromeIdentityService> chrome_identity_service_;
+  std::unique_ptr<TestUpdatableResourceProvider>
+      test_updatable_resource_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(TestChromeBrowserProvider);
 };