Deprecate SkDevice::accessBitmap method

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index bcbff3285c16f1336c9cc23306ed3423e24510d1..8370eabd6aa587d61706262e172ff73eff35b2da 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -658,8 +658,7 @@ SkPDFDevice::SkPDFDevice(SkISize pageSize, SkScalar rasterDpi, SkPDFDocument* do
     , fDocument(doc) {
     SkASSERT(pageSize.width() > 0);
     SkASSERT(pageSize.height() > 0);
-    fLegacyBitmap.setInfo(
-            SkImageInfo::MakeUnknown(pageSize.width(), pageSize.height()));
+
     if (flip) {
         // Skia generally uses the top left as the origin but PDF
         // natively has the origin at the bottom left. This matrix
@@ -1402,7 +1401,8 @@ void SkPDFDevice::drawDevice(const SkDraw& d, SkBaseDevice* device,
 }
 
 SkImageInfo SkPDFDevice::imageInfo() const {
-    return fLegacyBitmap.info();
+    SkImageInfo info = SkImageInfo::MakeUnknown(fPageSize.width(), fPageSize.height());
+    return info;
 }
 
 void SkPDFDevice::onAttachToCanvas(SkCanvas* canvas) {