Replace uses of legacy SkBitmap::copyTo() API

chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp

Index: chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp
diff --git a/chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp b/chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp
index c551c5044c68105fffd690cb43c61dd402289101..50b90849b018aa932524c5e9e27788df222ba55b 100644
--- a/chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp
+++ b/chrome/browser/chromeos/login/screenshot_testing/SkPMetric.cpp
@@ -128,7 +128,10 @@ static void adobergb_to_cielab(float r, float g, float b, LAB* lab) {
 static bool bitmap_to_cielab(const SkBitmap* bitmap, ImageLAB* outImageLAB) {
   SkBitmap bm8888;
   if (bitmap->colorType() != kN32_SkColorType) {
-    if (!bitmap->copyTo(&bm8888, kN32_SkColorType)) {
+    SkImageInfo info8888 = bitmap.info().makeColorType(kN32_SkColorType);
+    if (!bm8888.tryAllocPixels(info8888) ||
+        !bitmap->readPixels(info8888, bm8888.getPixels(), bm8888.rowBytes(), 0,
+                            0)) {
       return false;
     }
     bitmap = &bm8888;