Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp

Index: third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp b/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
index 2470923398990b84a3fcf305d4e0b8f08208c86a..cfcf034abb2f8e4dfc645daf5acb7045d76bab5d 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
@@ -85,7 +85,7 @@ PassRefPtr<StringImpl> LayoutTextFragment::originalText() const
 
 void LayoutTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
 {
-    LayoutText::setText(text, force);
+    LayoutText::setText(std::move(text), force);
 
     m_start = 0;
     m_fragmentLength = textLength();
@@ -101,7 +101,7 @@ void LayoutTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
 
 void LayoutTextFragment::setTextFragment(PassRefPtr<StringImpl> text, unsigned start, unsigned length)
 {
-    LayoutText::setText(text, false);
+    LayoutText::setText(std::move(text), false);
 
     m_start = start;
     m_fragmentLength = length;