Revert of move to modify onCreateDevice virtual

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index 4395daca16711a52b2c56a39f2c6a3d88e571864..b14ca729028a60d035b37bf65923f751793af79d 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -567,19 +567,19 @@
     }
 }
 
-SkBaseDevice* SkPDFDevice::onCreateCompatibleDevice(const CreateInfo& cinfo) {
+SkBaseDevice* SkPDFDevice::onCreateDevice(const SkImageInfo& info, Usage usage) {
     // PDF does not support image filters, so render them on CPU.
     // Note that this rendering is done at "screen" resolution (100dpi), not
     // printer resolution.
     // FIXME: It may be possible to express some filters natively using PDF
     // to improve quality and file size (http://skbug.com/3043)
-    if (kImageFilter_Usage == cinfo.fUsage) {
-        return SkBitmapDevice::Create(cinfo.fInfo);
+    if (kImageFilter_Usage == usage) {
+        return SkBitmapDevice::Create(info);
     }
 
     SkMatrix initialTransform;
     initialTransform.reset();
-    SkISize size = SkISize::Make(cinfo.fInfo.width(), cinfo.fInfo.height());
+    SkISize size = SkISize::Make(info.width(), info.height());
     return SkNEW_ARGS(SkPDFDevice, (size, size, initialTransform));
 }