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

ios/chrome/browser/net/ios_chrome_url_request_context_getter.h

Index: ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
diff --git a/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h b/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
index 531490d9c7d8c01947e143b7698d0c342de9bc48..9e8cc8fd4953c71c1c706f22e7ae102f22314f27 100644
--- a/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
+++ b/ios/chrome/browser/net/ios_chrome_url_request_context_getter.h
@@ -5,8 +5,9 @@
 #ifndef IOS_CHROME_BROWSER_NET_IOS_CHROME_URL_REQUEST_CONTEXT_GETTER_H_
 #define IOS_CHROME_BROWSER_NET_IOS_CHROME_URL_REQUEST_CONTEXT_GETTER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/chrome/browser/net/net_types.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -25,7 +26,7 @@ class IOSChromeURLRequestContextGetter : public net::URLRequestContextGetter {
   // Constructs a ChromeURLRequestContextGetter that will use |factory| to
   // create the URLRequestContext.
   explicit IOSChromeURLRequestContextGetter(
-      scoped_ptr<IOSChromeURLRequestContextFactory> factory);
+      std::unique_ptr<IOSChromeURLRequestContextFactory> factory);
 
   // Note that GetURLRequestContext() can only be called from the IO
   // thread (it will assert otherwise).
@@ -58,7 +59,7 @@ class IOSChromeURLRequestContextGetter : public net::URLRequestContextGetter {
 
   // Deferred logic for creating a URLRequestContext.
   // Access only from the IO thread.
-  scoped_ptr<IOSChromeURLRequestContextFactory> factory_;
+  std::unique_ptr<IOSChromeURLRequestContextFactory> factory_;
 
   // NULL before initialization and after invalidation.
   // Otherwise, it is the URLRequestContext instance that