Add sk_sp helpers and switch Blink SkShader clients to the new APIs

third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp

Index: third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp b/third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp
index afe68b2419c1b73ab320a33ff569789c17523f26..5a1b25147f3bbf1f335b6ee5fcb8694eec06d51a 100644
--- a/third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GeneratedImage.cpp
@@ -47,14 +47,14 @@ void GeneratedImage::drawPattern(GraphicsContext& destContext, const FloatRect&
     SkPictureBuilder builder(tileRect, nullptr, &destContext);
     builder.context().beginRecording(tileRect);
     drawTile(builder.context(), srcRect);
-    RefPtr<const SkPicture> tilePicture = builder.endRecording();
+    RefPtr<SkPicture> tilePicture = builder.endRecording();
 
     AffineTransform patternTransform;
     patternTransform.translate(phase.x(), phase.y());
     patternTransform.scale(scale.width(), scale.height());
     patternTransform.translate(tileRect.x(), tileRect.y());
 
-    RefPtr<Pattern> picturePattern = Pattern::createPicturePattern(tilePicture);
+    RefPtr<Pattern> picturePattern = Pattern::createPicturePattern(tilePicture.release());

[Stephen White, 2016/03/18 14:48:27]

Out of curiosity, is this release() necessary? Or just to avoid churn?

[f(malita), 2016/03/18 15:11:53]

The latter: it would work fine without a release, but we'd be spinning the ref
count unnecessarily. 

     picturePattern->setPatternSpaceTransform(patternTransform);
 
     SkPaint fillPaint = destContext.fillPaint();