Remove SkDevice, obsolete constructor

skia/ext/skia_utils_mac.h

Index: skia/ext/skia_utils_mac.h
diff --git a/skia/ext/skia_utils_mac.h b/skia/ext/skia_utils_mac.h
index d15fa568447482847e8014fd9dd8f34870da020b..e88c1100076be4033711eb53159ef629d15def3b 100644
--- a/skia/ext/skia_utils_mac.h
+++ b/skia/ext/skia_utils_mac.h
@@ -97,8 +97,13 @@ SK_API NSImage* SkBitmapToNSImage(const SkBitmap& icon);
 // Converts a SkCanvas temporarily to a CGContext
 class SK_API SkiaBitLocker {
  public:
-  // TODO(ccameron): delete this constructor
-  explicit SkiaBitLocker(SkCanvas* canvas);
+  /**
+    User clip rect is an *additional* clip to be applied in addition to the
+    current state of the canvas, in *local* rather than device coordinates.
+    If no additional clipping is desired, pass in
+    SkIRect::MakeSize(canvas->getBaseLayerSize()) transformed by the inverse
+    CTM.
+   */
   SkiaBitLocker(SkCanvas* canvas,
                 const SkIRect& userClipRect,
                 SkScalar bitmapScaleFactor = 1);
@@ -112,11 +117,6 @@ class SK_API SkiaBitLocker {
 
   SkCanvas* canvas_;
 
-  // If the user specified a clip rect it would draw into then the locker may
-  // skip the step of searching for a rect bounding the pixels that the user
-  // has drawn into.
-  bool userClipRectSpecified_;
-
   CGContextRef cgContext_;
   // offscreen_ is only valid if useDeviceBits_ is false
   SkBitmap offscreen_;