Made conversions from PassRefPtr to WebPrivatePtr move only.

third_party/WebKit/Source/platform/exported/WebData.cpp

Index: third_party/WebKit/Source/platform/exported/WebData.cpp
diff --git a/third_party/WebKit/Source/platform/exported/WebData.cpp b/third_party/WebKit/Source/platform/exported/WebData.cpp
index 1c870f97e065560248d2c61a28501e4e6ed51fdd..9f9dca278a845fdd41dde44678b5f142cc33730b 100644
--- a/third_party/WebKit/Source/platform/exported/WebData.cpp
+++ b/third_party/WebKit/Source/platform/exported/WebData.cpp
@@ -58,10 +58,11 @@ const char* WebData::Data() const {
   return private_->Data();
 }
 
-WebData::WebData(PassRefPtr<SharedBuffer> buffer) : private_(buffer) {}
+WebData::WebData(PassRefPtr<SharedBuffer> buffer)
+    : private_(std::move(buffer)) {}
 
 WebData& WebData::operator=(PassRefPtr<SharedBuffer> buffer) {
-  private_ = buffer;
+  private_ = std::move(buffer);
   return *this;
 }