SkBitmap and SkPixelRef no longer need lock/unlock

content/browser/devtools/protocol/devtools_protocol_browsertest.cc

Index: content/browser/devtools/protocol/devtools_protocol_browsertest.cc
diff --git a/content/browser/devtools/protocol/devtools_protocol_browsertest.cc b/content/browser/devtools/protocol/devtools_protocol_browsertest.cc
index 1152b6690cee033bacbcd9a21d44fd4ce58f4b7f..0e4199698407a79bc0e067158b70643ce8b538da 100644
--- a/content/browser/devtools/protocol/devtools_protocol_browsertest.cc
+++ b/content/browser/devtools/protocol/devtools_protocol_browsertest.cc
@@ -579,9 +579,6 @@ bool MatchesBitmap(const SkBitmap& expected_bmp,
     return false;
   }
 
-  SkAutoLockPixels lock_actual_bmp(actual_bmp);
-  SkAutoLockPixels lock_expected_bmp(expected_bmp);
-
   DCHECK(gfx::SkIRectToRect(actual_bmp.bounds()).Contains(matching_mask));
 
   for (int x = matching_mask.x(); x < matching_mask.right(); ++x) {