Convert //content from scoped_ptr to std::unique_ptr

content/utility/utility_blink_platform_impl.h

Index: content/utility/utility_blink_platform_impl.h
diff --git a/content/utility/utility_blink_platform_impl.h b/content/utility/utility_blink_platform_impl.h
index d66299eca6ff6d67e7767a82b5e8e2a5154649ca..32f9007c7e13070a6cc069b61b7fe02c2f089cfd 100644
--- a/content/utility/utility_blink_platform_impl.h
+++ b/content/utility/utility_blink_platform_impl.h
@@ -5,8 +5,9 @@
 #ifndef CONTENT_UTILITY_UTILITY_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_UTILITY_UTILITY_BLINK_PLATFORM_IMPL_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "content/child/blink_platform_impl.h"
 
 namespace content {
@@ -22,7 +23,7 @@ class UtilityBlinkPlatformImpl : public BlinkPlatformImpl {
   blink::WebThread* currentThread() override;
 
  private:
-  scoped_ptr<WebThreadImplForUtilityThread> main_thread_;
+  std::unique_ptr<WebThreadImplForUtilityThread> main_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityBlinkPlatformImpl);
 };