Replaced PassRefPtr copies with moves in Source/core.

third_party/WebKit/Source/core/frame/ImageBitmap.cpp

Index: third_party/WebKit/Source/core/frame/ImageBitmap.cpp
diff --git a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
index f27e390cba8237ec7a507ead66481662a8d7c75f..4c1c4da8efab9c83a6bb653ff125f7039c287c70 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.cpp
@@ -624,12 +624,12 @@ ImageBitmap* ImageBitmap::create(ImageBitmap* bitmap, Optional<IntRect> cropRect
 
 ImageBitmap* ImageBitmap::create(PassRefPtr<StaticBitmapImage> image, Optional<IntRect> cropRect, const ImageBitmapOptions& options)
 {
-    return new ImageBitmap(image, cropRect, options);
+    return new ImageBitmap(std::move(image), cropRect, options);
 }
 
 ImageBitmap* ImageBitmap::create(PassRefPtr<StaticBitmapImage> image)
 {
-    return new ImageBitmap(image);
+    return new ImageBitmap(std::move(image));
 }
 
 ImageBitmap* ImageBitmap::create(std::unique_ptr<uint8_t[]> data, uint32_t width, uint32_t height, bool isImageBitmapPremultiplied, bool isImageBitmapOriginClean)