Revert of Improve usage of window rectangles

src/gpu/GrWindowRectsState.h

-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrWindowRectsState_DEFINED
-#define GrWindowRectsState_DEFINED
-
-#include "GrWindowRectangles.h"
-
-class GrWindowRectsState {
-public:
-    enum class Mode : bool {
-        kExclusive,
-        kInclusive
-    };
-
-    GrWindowRectsState() : fMode(Mode::kExclusive) {}
-    GrWindowRectsState(const GrWindowRectangles& windows, const SkIPoint& origin, Mode mode)
-        : fMode(mode)
-        , fOrigin(origin)
-        , fWindows(windows) {
-    }
-
-    bool enabled() const { return Mode::kInclusive == fMode || !fWindows.empty(); }
-    Mode mode() const { return fMode; }
-    const SkIPoint& origin() const { return fOrigin; }
-    const GrWindowRectangles& windows() const { return fWindows; }
-    int numWindows() const { return fWindows.count(); }
-
-    void setDisabled() {
-        fMode = Mode::kExclusive;
-        fWindows.reset();
-    }
-
-    void set(const GrWindowRectangles& windows, const SkIPoint& origin, Mode mode) {
-        fMode = mode;
-        fOrigin = origin;
-        fWindows = windows;
-    }
-
-    bool cheapEqualTo(const GrWindowRectsState& that) const {
-        if (fMode != that.fMode) {
-            return false;
-        }
-        if (!fWindows.empty() && fOrigin != that.fOrigin) {
-            return false;
-        }
-        return fWindows == that.fWindows;
-    }
-
-private:
-    Mode                 fMode;
-    SkIPoint             fOrigin;
-    GrWindowRectangles   fWindows;
-};
-
-#endif