Remove SK_IGNORE_QUAD_RR_CORNERS_OPT-related code.

Now that the flag is no longer used in Chromium
(https://codereview.chromium.org/426593006/), we can remove it.

R=bsalomon@google.com, reed@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/430473012

src/core/SkPath.cpp

diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 7f2e67a..aa7943c 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -1089,11 +1089,6 @@
         this->addRect(bounds, dir);
     } else if (rrect.isOval()) {
         this->addOval(bounds, dir);
-#ifdef SK_IGNORE_QUAD_RR_CORNERS_OPT
-    } else if (rrect.isSimple()) {
-        const SkVector& rad = rrect.getSimpleRadii();
-        this->addRoundRect(bounds, rad.x(), rad.y(), dir);
-#endif
     } else {
         fDirection = this->hasOnlyMoveTos() ? dir : kUnknown_Direction;
 
@@ -1135,10 +1130,6 @@
     return true;
 }
 
-#ifdef SK_IGNORE_QUAD_RR_CORNERS_OPT
-#define CUBIC_ARC_FACTOR    ((SK_ScalarSqrt2 - SK_Scalar1) * 4 / 3)
-#endif
-
 void SkPath::addRoundRect(const SkRect& rect, SkScalar rx, SkScalar ry,
                           Direction dir) {
     assert_known_direction(dir);
@@ -1151,96 +1142,9 @@
         return;
     }
 
-#ifdef SK_IGNORE_QUAD_RR_CORNERS_OPT
-    SkScalar    w = rect.width();
-    SkScalar    halfW = SkScalarHalf(w);
-    SkScalar    h = rect.height();
-    SkScalar    halfH = SkScalarHalf(h);
-
-    if (halfW <= 0 || halfH <= 0) {
-        return;
-    }
-
-    bool skip_hori = rx >= halfW;
-    bool skip_vert = ry >= halfH;
-
-    if (skip_hori && skip_vert) {
-        this->addOval(rect, dir);
-        return;
-    }
-
-    fDirection = this->hasOnlyMoveTos() ? dir : kUnknown_Direction;
-
-    SkAutoPathBoundsUpdate apbu(this, rect);
-    SkAutoDisableDirectionCheck addc(this);
-
-    if (skip_hori) {
-        rx = halfW;
-    } else if (skip_vert) {
-        ry = halfH;
-    }
-    SkScalar    sx = SkScalarMul(rx, CUBIC_ARC_FACTOR);
-    SkScalar    sy = SkScalarMul(ry, CUBIC_ARC_FACTOR);
-
-    this->incReserve(17);
-    this->moveTo(rect.fRight - rx, rect.fTop);                  // top-right
-    if (dir == kCCW_Direction) {
-        if (!skip_hori) {
-            this->lineTo(rect.fLeft + rx, rect.fTop);           // top
-        }
-        this->cubicTo(rect.fLeft + rx - sx, rect.fTop,
-                      rect.fLeft, rect.fTop + ry - sy,
-                      rect.fLeft, rect.fTop + ry);          // top-left
-        if (!skip_vert) {
-            this->lineTo(rect.fLeft, rect.fBottom - ry);        // left
-        }
-        this->cubicTo(rect.fLeft, rect.fBottom - ry + sy,
-                      rect.fLeft + rx - sx, rect.fBottom,
-                      rect.fLeft + rx, rect.fBottom);       // bot-left
-        if (!skip_hori) {
-            this->lineTo(rect.fRight - rx, rect.fBottom);       // bottom
-        }
-        this->cubicTo(rect.fRight - rx + sx, rect.fBottom,
-                      rect.fRight, rect.fBottom - ry + sy,
-                      rect.fRight, rect.fBottom - ry);      // bot-right
-        if (!skip_vert) {
-            this->lineTo(rect.fRight, rect.fTop + ry);          // right
-        }
-        this->cubicTo(rect.fRight, rect.fTop + ry - sy,
-                      rect.fRight - rx + sx, rect.fTop,
-                      rect.fRight - rx, rect.fTop);         // top-right
-    } else {
-        this->cubicTo(rect.fRight - rx + sx, rect.fTop,
-                      rect.fRight, rect.fTop + ry - sy,
-                      rect.fRight, rect.fTop + ry);         // top-right
-        if (!skip_vert) {
-            this->lineTo(rect.fRight, rect.fBottom - ry);       // right
-        }
-        this->cubicTo(rect.fRight, rect.fBottom - ry + sy,
-                      rect.fRight - rx + sx, rect.fBottom,
-                      rect.fRight - rx, rect.fBottom);      // bot-right
-        if (!skip_hori) {
-            this->lineTo(rect.fLeft + rx, rect.fBottom);        // bottom
-        }
-        this->cubicTo(rect.fLeft + rx - sx, rect.fBottom,
-                      rect.fLeft, rect.fBottom - ry + sy,
-                      rect.fLeft, rect.fBottom - ry);       // bot-left
-        if (!skip_vert) {
-            this->lineTo(rect.fLeft, rect.fTop + ry);           // left
-        }
-        this->cubicTo(rect.fLeft, rect.fTop + ry - sy,
-                      rect.fLeft + rx - sx, rect.fTop,
-                      rect.fLeft + rx, rect.fTop);          // top-left
-        if (!skip_hori) {
-            this->lineTo(rect.fRight - rx, rect.fTop);          // top
-        }
-    }
-    this->close();
-#else
     SkRRect rrect;
     rrect.setRectXY(rect, rx, ry);
     this->addRRect(rrect, dir);
-#endif
 }
 
 void SkPath::addOval(const SkRect& oval, Direction dir) {