Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/layout/api/LayoutTextItem.h

Index: third_party/WebKit/Source/core/layout/api/LayoutTextItem.h
diff --git a/third_party/WebKit/Source/core/layout/api/LayoutTextItem.h b/third_party/WebKit/Source/core/layout/api/LayoutTextItem.h
index 3eaedd85f980eeb291582ed6b23ce928e17758be..0b550fa0415a22e12dd4110a5e203cb008bc5e44 100644
--- a/third_party/WebKit/Source/core/layout/api/LayoutTextItem.h
+++ b/third_party/WebKit/Source/core/layout/api/LayoutTextItem.h
@@ -32,12 +32,12 @@ public:
 
     void setStyle(PassRefPtr<ComputedStyle> style)
     {
-        toText()->setStyle(style);
+        toText()->setStyle(std::move(style));
     }
 
     void setText(PassRefPtr<StringImpl> text, bool force = false)
     {
-        toText()->setText(text, force);
+        toText()->setText(std::move(text), force);
     }
 
     bool isTextFragment() const