Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm

Index: chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm b/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
index 983ae5277981a11df6b259b985356e3249b5d51b..aab0fa06feb40f622236794b9665960bb63641cb 100644
--- a/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/chrome_web_contents_view_delegate_mac.mm
@@ -57,7 +57,7 @@ void ChromeWebContentsViewDelegateMac::ShowContextMenu(
 }
 
 void ChromeWebContentsViewDelegateMac::ShowMenu(
-    scoped_ptr<RenderViewContextMenuBase> menu) {
+    std::unique_ptr<RenderViewContextMenuBase> menu) {
   // TODO(erikchen): Remove ScopedTracker below once crbug.com/458401 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
@@ -81,7 +81,7 @@ void ChromeWebContentsViewDelegateMac::ShowMenu(
   context_menu_->Show();
 }
 
-scoped_ptr<RenderViewContextMenuBase>
+std::unique_ptr<RenderViewContextMenuBase>
 ChromeWebContentsViewDelegateMac::BuildMenu(
     content::WebContents* web_contents,
     const content::ContextMenuParams& params) {
@@ -89,7 +89,7 @@ ChromeWebContentsViewDelegateMac::BuildMenu(
   tracked_objects::ScopedTracker tracking_profile1(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "458401 ChromeWebContentsViewDelegateMac::BuildMenu"));
-  scoped_ptr<RenderViewContextMenuBase> menu;
+  std::unique_ptr<RenderViewContextMenuBase> menu;
   content::RenderFrameHost* focused_frame = web_contents->GetFocusedFrame();
   // If the frame tree does not have a focused frame at this point, do not
   // bother creating RenderViewContextMenuMac.