Remove PlatformThemeChromiumDefault as it is dead code

Source/core/platform/chromium/PlatformThemeChromiumDefault.cpp

Index: Source/core/platform/chromium/PlatformThemeChromiumDefault.cpp
diff --git a/Source/core/platform/chromium/PlatformThemeChromiumDefault.cpp b/Source/core/platform/chromium/PlatformThemeChromiumDefault.cpp
deleted file mode 100644
index f257da14b097668cf44bb605a8539b8d26d89f5d..0000000000000000000000000000000000000000
--- a/Source/core/platform/chromium/PlatformThemeChromiumDefault.cpp
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "core/platform/chromium/PlatformThemeChromiumDefault.h"
-
-namespace WebCore {
-
-unsigned PlatformThemeChromiumDefault::s_thumbInactiveColor = 0xeaeaea;
-unsigned PlatformThemeChromiumDefault::s_thumbActiveColor = 0xf4f4f4;
-unsigned PlatformThemeChromiumDefault::s_trackColor = 0xd3d3d3;
-
-void PlatformThemeChromiumDefault::setScrollbarColors(
-    SkColor inactiveColor, SkColor activeColor, SkColor trackColor)
-{
-    s_thumbInactiveColor = inactiveColor;
-    s_thumbActiveColor = activeColor;
-    s_trackColor = trackColor;
-}
-
-static SkScalar clamp(SkScalar value, SkScalar min, SkScalar max)
-{
-    return std::min(std::max(value, min), max);
-}
-
-SkColor PlatformThemeChromiumDefault::saturateAndBrighten(const SkScalar hsv[3], SkScalar saturateAmount, SkScalar brightenAmount)
-{
-    SkScalar color[3];
-    color[0] = hsv[0];
-    color[1] = clamp(hsv[1] + saturateAmount, 0.0, 1.0);
-    color[2] = clamp(hsv[2] + brightenAmount, 0.0, 1.0);
-    return SkHSVToColor(color);
-}
-
-SkColor PlatformThemeChromiumDefault::outlineColor(const SkScalar hsv1[3], const SkScalar hsv2[3])
-{
-    // GTK Theme engines have way too much control over the layout of
-    // the scrollbar. We might be able to more closely approximate its
-    // look-and-feel, if we sent whole images instead of just colors
-    // from the browser to the renderer. But even then, some themes
-    // would just break.
-    //
-    // So, instead, we don't even try to 100% replicate the look of
-    // the native scrollbar. We render our own version, but we make
-    // sure to pick colors that blend in nicely with the system GTK
-    // theme. In most cases, we can just sample a couple of pixels
-    // from the system scrollbar and use those colors to draw our
-    // scrollbar.
-    //
-    // This works fine for the track color and the overall thumb
-    // color. But it fails spectacularly for the outline color used
-    // around the thumb piece. Not all themes have a clearly defined
-    // outline. For some of them it is partially transparent, and for
-    // others the thickness is very unpredictable.
-    //
-    // So, instead of trying to approximate the system theme, we
-    // instead try to compute a reasonable looking choice based on the
-    // known color of the track and the thumb piece. This is difficult
-    // when trying to deal both with high- and low-contrast themes,
-    // and both with positive and inverted themes.
-    //
-    // The following code has been tested to look OK with all of the
-    // default GTK themes.
-    SkScalar minDiff = clamp((hsv1[1] + hsv2[1]) * 1.2, 0.28, 0.5);
-    SkScalar diff = clamp(fabs(hsv1[2] - hsv2[2]) / 2, minDiff, 0.5);
-
-    if (hsv1[2] + hsv2[2] > 1.0)
-        diff = -diff;
-
-    return saturateAndBrighten(hsv2, -0.2, diff);
-}
-
-void PlatformThemeChromiumDefault::paintArrowButton(GraphicsContext* gc, const IntRect& rect, ArrowDirection direction, ControlStates states)
-{
-    SkCanvas* const canvas = gc->canvas();
-    int widthMiddle, lengthMiddle;
-    SkPaint paint;
-    if (direction == North || direction == South) {
-        widthMiddle = rect.width() / 2 + 1;
-        lengthMiddle = rect.height() / 2 + 1;
-    } else {
-        lengthMiddle = rect.width() / 2 + 1;
-        widthMiddle = rect.height() / 2 + 1;
-    }
-
-    // Calculate button color.
-    SkScalar trackHSV[3];
-    SkColorToHSV(trackColor(), trackHSV);
-    SkColor buttonColor = saturateAndBrighten(trackHSV, 0, 0.2);
-    SkColor backgroundColor = buttonColor;
-    if (states & PressedState) {
-        SkScalar buttonHSV[3];
-        SkColorToHSV(buttonColor, buttonHSV);
-        buttonColor = saturateAndBrighten(buttonHSV, 0, -0.1);
-    } else if (states & HoverState) {
-        SkScalar buttonHSV[3];
-        SkColorToHSV(buttonColor, buttonHSV);
-        buttonColor = saturateAndBrighten(buttonHSV, 0, 0.05);
-    }
-
-    SkIRect skrect;
-    skrect.set(rect.x(), rect.y(), rect.x() + rect.width(), rect.y() + rect.height());
-    // Paint the background (the area visible behind the rounded corners).
-    paint.setColor(backgroundColor);
-    canvas->drawIRect(skrect, paint);
-
-    // Paint the button's outline and fill the middle
-    SkPath outline;
-    switch (direction) {
-    case North:
-        outline.moveTo(rect.x() + 0.5, rect.y() + rect.height() + 0.5);
-        outline.rLineTo(0, -(rect.height() - 2));
-        outline.rLineTo(2, -2);
-        outline.rLineTo(rect.width() - 5, 0);
-        outline.rLineTo(2, 2);
-        outline.rLineTo(0, rect.height() - 2);
-        break;
-    case South:
-        outline.moveTo(rect.x() + 0.5, rect.y() - 0.5);
-        outline.rLineTo(0, rect.height() - 2);
-        outline.rLineTo(2, 2);
-        outline.rLineTo(rect.width() - 5, 0);
-        outline.rLineTo(2, -2);
-        outline.rLineTo(0, -(rect.height() - 2));
-        break;
-    case East:
-        outline.moveTo(rect.x() - 0.5, rect.y() + 0.5);
-        outline.rLineTo(rect.width() - 2, 0);
-        outline.rLineTo(2, 2);
-        outline.rLineTo(0, rect.height() - 5);
-        outline.rLineTo(-2, 2);
-        outline.rLineTo(-(rect.width() - 2), 0);
-        break;
-    case West:
-        outline.moveTo(rect.x() + rect.width() + 0.5, rect.y() + 0.5);
-        outline.rLineTo(-(rect.width() - 2), 0);
-        outline.rLineTo(-2, 2);
-        outline.rLineTo(0, rect.height() - 5);
-        outline.rLineTo(2, 2);
-        outline.rLineTo(rect.width() - 2, 0);
-        break;
-    }
-    outline.close();
-
-    paint.setStyle(SkPaint::kFill_Style);
-    paint.setColor(buttonColor);
-    canvas->drawPath(outline, paint);
-
-    paint.setAntiAlias(true);
-    paint.setStyle(SkPaint::kStroke_Style);
-    SkScalar thumbHSV[3];
-    SkColorToHSV(thumbInactiveColor(), thumbHSV);
-    paint.setColor(outlineColor(trackHSV, thumbHSV));
-    canvas->drawPath(outline, paint);
-
-    // If the button is disabled or read-only, the arrow is drawn with the outline color.
-    if (states & EnabledState && !(states & ReadOnlyState))
-        paint.setColor(SK_ColorBLACK);
-
-    paint.setAntiAlias(false);
-    paint.setStyle(SkPaint::kFill_Style);
-
-    SkPath path;
-    // The constants in this block of code are hand-tailored to produce good
-    // looking arrows without anti-aliasing.
-    switch (direction) {
-    case North:
-        path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle + 2);
-        path.rLineTo(7, 0);
-        path.rLineTo(-4, -4);
-        break;
-    case South:
-        path.moveTo(rect.x() + widthMiddle - 4, rect.y() + lengthMiddle - 3);
-        path.rLineTo(7, 0);
-        path.rLineTo(-4, 4);
-        break;
-    case East:
-        path.moveTo(rect.x() + lengthMiddle - 3, rect.y() + widthMiddle - 4);
-        path.rLineTo(0, 7);
-        path.rLineTo(4, -4);
-        break;
-    case West:
-        path.moveTo(rect.x() + lengthMiddle + 1, rect.y() + widthMiddle - 5);
-        path.rLineTo(0, 9);
-        path.rLineTo(-4, -4);
-        break;
-    }
-    path.close();
-
-    canvas->drawPath(path, paint);
-}
-
-} // namespace WebCore
-