remove unused SkAutoROCanvasPixels

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1550583002

TBR=

Review URL: https://codereview.chromium.org/1550583002

1 files changed, 0 insertions, 43 deletions

diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 854611aec1..d36b9918e4 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1554,49 +1554,6 @@ private:
 };
 #define SkAutoCanvasRestore(...) SK_REQUIRE_LOCAL_VAR(SkAutoCanvasRestore)
 
-/**
- *  If the caller wants read-only access to the pixels in a canvas, it can just
- *  call canvas->peekPixels(), since that is the fastest way to "peek" at the
- *  pixels on a raster-backed canvas.
- *
- *  If the canvas has pixels, but they are not readily available to the CPU
- *  (e.g. gpu-backed), then peekPixels() will fail, but readPixels() will
- *  succeed (though be slower, since it will return a copy of the pixels).
- *
- *  SkAutoROCanvasPixels encapsulates these two techniques, trying first to call
- *  peekPixels() (for performance), but if that fails, calling readPixels() and
- *  storing the copy locally.
- *
- *  The caller must respect the restrictions associated with peekPixels(), since
- *  that may have been called: The returned information is invalidated if...
- *      - any API is called on the canvas (or its parent surface if present)
- *      - the canvas goes out of scope
- */
-class SkAutoROCanvasPixels : SkNoncopyable {
-public:
-    SkAutoROCanvasPixels(SkCanvas* canvas);
-
-    // returns NULL on failure
-    const void* addr() const { return fAddr; }
-
-    // undefined if addr() == NULL
-    size_t rowBytes() const { return fRowBytes; }
-
-    // undefined if addr() == NULL
-    const SkImageInfo& info() const { return fInfo; }
-
-    // helper that, if returns true, installs the pixels into the bitmap. Note
-    // that the bitmap may reference the address returned by peekPixels(), so
-    // the caller must respect the restrictions associated with peekPixels().
-    bool asROBitmap(SkBitmap*) const;
-
-private:
-    SkBitmap    fBitmap;    // used if peekPixels() fails
-    const void* fAddr;      // NULL on failure
-    SkImageInfo fInfo;
-    size_t      fRowBytes;
-};
-
 #ifdef SK_SUPPORT_LEGACY_SAVEFLAGS
 static inline SkCanvas::SaveFlags operator|(const SkCanvas::SaveFlags lhs,
                                             const SkCanvas::SaveFlags rhs) {