SkBitmap and SkPixelRef no longer need lock/unlock

remoting/host/chromeos/skia_bitmap_desktop_frame.cc

Index: remoting/host/chromeos/skia_bitmap_desktop_frame.cc
diff --git a/remoting/host/chromeos/skia_bitmap_desktop_frame.cc b/remoting/host/chromeos/skia_bitmap_desktop_frame.cc
index a692a39a35addbf303290a727519de1c4f5c1da8..31e2100a8e5522d612ae06e6e5e16ec8374983ec 100644
--- a/remoting/host/chromeos/skia_bitmap_desktop_frame.cc
+++ b/remoting/host/chromeos/skia_bitmap_desktop_frame.cc
@@ -19,10 +19,7 @@ SkiaBitmapDesktopFrame* SkiaBitmapDesktopFrame::Create(
   DCHECK_EQ(kBGRA_8888_SkColorType, bitmap->info().colorType())
       << "DesktopFrame objects always hold RGBA data.";
 
-  bitmap->lockPixels();
   uint8_t* bitmap_data = reinterpret_cast<uint8_t*>(bitmap->getPixels());
-  bitmap->unlockPixels();
-
   const size_t row_bytes = bitmap->rowBytes();
   SkiaBitmapDesktopFrame* result = new SkiaBitmapDesktopFrame(
       size, row_bytes, bitmap_data, std::move(bitmap));