General clean up on bookmaker.

Command line runs without error for
SkBitmap, SkPath, SkRect, SkIRect,
SkPixmap, SkCanvas.

Docs-Preview: https://skia.org/?cl=57112
TBR: caryclark@google.com
Bug: skia:6898
Change-Id: I73b69ae8ffdf0a1e6bc187dc8a9dfb28f7766faa
Reviewed-on: https://skia-review.googlesource.com/57112
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@skia.org>
diff --git a/docs/SkCanvas_Reference.bmh b/docs/SkCanvas_Reference.bmh
index 3e73691..486fe46 100644
--- a/docs/SkCanvas_Reference.bmh
+++ b/docs/SkCanvas_Reference.bmh
@@ -6104,4 +6104,55 @@
 ##
 
 #Class SkCanvas ##
+
+#Class SkAutoCanvasRestore
+
+Stack helper class calls SkCanvas::restoreToCount() when SkAutoCanvasRestore
+goes out of scope. Use this to guarantee that the canvas is restored to a known
+state.
+
+#Method SkAutoCanvasRestore(SkCanvas* canvas, bool doSave)
+
+Preserves Canvas save count. Optionally saves Canvas Clip and Matrix.
+
+#Param canvas  Canvas to guard ##
+#Param doSave  call SkCanvas::save() ##
+
+#Return utility to restore Canvas state on destructor ##
+
+#Example
+// incomplete
+##
+
+#SeeAlso SkCanvas::save SkCanvas::restore
+
+##
+
+#Method ~SkAutoCanvasRestore()
+
+Restores Canvas to saved state.
+
+#Example
+// incomplete
+##
+
+#SeeAlso SkCanvas::save SkCanvas::restore
+
+##
+
+#Method void restore()
+
+Restores Canvas to saved state immediately. Subsequent calls and class 
+destructor have no effect.
+
+#Example
+// incomplete
+##
+
+#SeeAlso SkCanvas::save SkCanvas::restore
+
+##
+
+#Class SkAutoCanvasRestore ##
+
 #Topic Canvas ##