remove unused SkLayer

BUG=skia:

Change-Id: Ia3b53bd3811a3b9246668739c304ad3654699da0
Reviewed-on: https://skia-review.googlesource.com/7737
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

gn/utils.gni

@@ -15,7 +15,6 @@ skia_utils_sources = [
   "$_include/utils/SkDumpCanvas.h",
   "$_include/utils/SkEventTracer.h",
   "$_include/utils/SkInterpolator.h",
-  "$_include/utils/SkLayer.h",
   "$_include/utils/SkMeshUtils.h",
   "$_include/utils/SkNoDrawCanvas.h",
   "$_include/utils/SkNWayCanvas.h",
@@ -48,7 +47,6 @@ skia_utils_sources = [
   "$_src/utils/SkEventTracer.cpp",
   "$_src/utils/SkFloatUtils.h",
   "$_src/utils/SkInterpolator.cpp",
-  "$_src/utils/SkLayer.cpp",
   "$_src/utils/SkMatrix22.cpp",
   "$_src/utils/SkMatrix22.h",
   "$_src/utils/SkMeshUtils.cpp",

include/utils/SkLayer.h

@@ -1,130 +0,0 @@
-
-/*
- * Copyright 2010 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkLayer_DEFINED
-#define SkLayer_DEFINED
-
-#include "../private/SkTDArray.h"
-#include "SkRefCnt.h"
-#include "SkColor.h"
-#include "SkMatrix.h"
-#include "SkPoint.h"
-#include "SkRect.h"
-#include "SkSize.h"
-
-class SkCanvas;
-
-class SkLayer : public SkRefCnt {
-
-public:
-    
-
-    SkLayer();
-    SkLayer(const SkLayer&);
-    virtual ~SkLayer();
-
-    bool isInheritFromRootTransform() const;
-    SkScalar getOpacity() const { return m_opacity; }
-    const SkSize& getSize() const { return m_size; }
-    const SkPoint& getPosition() const { return m_position; }
-    const SkPoint& getAnchorPoint() const { return m_anchorPoint; }
-    const SkMatrix& getMatrix() const { return fMatrix; }
-    const SkMatrix& getChildrenMatrix() const { return fChildrenMatrix; }
-
-    SkScalar getWidth() const { return m_size.width(); }
-    SkScalar getHeight() const { return m_size.height(); }
-
-    void setInheritFromRootTransform(bool);
-    void setOpacity(SkScalar opacity) { m_opacity = opacity; }
-    void setSize(SkScalar w, SkScalar h) { m_size.set(w, h); }
-    void setPosition(SkScalar x, SkScalar y) { m_position.set(x, y); }
-    void setAnchorPoint(SkScalar x, SkScalar y) { m_anchorPoint.set(x, y); }
-    void setMatrix(const SkMatrix&);
-    void setChildrenMatrix(const SkMatrix&);
-
-    // children
-
-    /** Return the number of layers in our child list.
-     */
-    int countChildren() const;
-
-    /** Return the child at the specified index (starting at 0). This does not
-        affect the reference count of the child.
-     */
-    SkLayer* getChild(int index) const;
-
-    /** Add this layer to our child list at the end (top-most), and ref() it.
-        If it was already in another hierarchy, remove it from that list.
-        Return the new child.
-     */
-    SkLayer* addChild(SkLayer* child);
-
-    /** Remove this layer from its parent's list (or do nothing if it has no
-        parent.) If it had a parent, then unref() is called.
-     */
-    void detachFromParent();
-
-    /** Remove, and unref(), all of the layers in our child list.
-     */
-    void removeChildren();
-
-    /** Return our parent layer, or NULL if we have none.
-     */
-    SkLayer* getParent() const { return fParent; }
-
-    /** Return the root layer in this hiearchy. If this layer is the root
-        (i.e. has no parent), then this returns itself.
-     */
-    SkLayer* getRootLayer() const;
-
-    // coordinate system transformations
-
-    /** Return, in matrix, the matix transfomations that are applied locally
-        when this layer draws (i.e. its position and matrix/anchorPoint).
-        This does not include the childrenMatrix, since that is only applied
-        after this layer draws (but before its children draw).
-     */
-    void getLocalTransform(SkMatrix* matrix) const;
-
-    /** Return, in matrix, the concatenation of transforms that are applied
-        from this layer's root parent to the layer itself.
-        This is the matrix that is applied to the layer during drawing.
-     */
-    void localToGlobal(SkMatrix* matrix) const;
-
-    // paint method
-
-    void draw(SkCanvas*, SkScalar opacity);
-    void draw(SkCanvas* canvas) {
-        this->draw(canvas, SK_Scalar1);
-    }
-
-protected:
-    virtual void onDraw(SkCanvas*, SkScalar opacity);
-
-private:
-    enum Flags {
-        kInheritFromRootTransform_Flag = 0x01
-    };
-
-    SkLayer*    fParent;
-    SkScalar    m_opacity;
-    SkSize      m_size;
-    SkPoint     m_position;
-    SkPoint     m_anchorPoint;
-    SkMatrix    fMatrix;
-    SkMatrix    fChildrenMatrix;
-    uint32_t    fFlags;
-
-    SkTDArray<SkLayer*> m_children;
-
-    typedef SkRefCnt INHERITED;
-};
-
-#endif