Merge java_staging/src into java/src.

chrome/android/java_staging/src/org/chromium/chrome/browser/widget/FadingShadow.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/widget/FadingShadow.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/widget/FadingShadow.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/widget/FadingShadow.java
deleted file mode 100644
index 8022051600c0deaae55f9b9ae5677d72ac0261b6..0000000000000000000000000000000000000000
--- a/chrome/android/java_staging/src/org/chromium/chrome/browser/widget/FadingShadow.java
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chrome.browser.widget;
-
-import android.graphics.Canvas;
-import android.graphics.Color;
-import android.graphics.LinearGradient;
-import android.graphics.Matrix;
-import android.graphics.Paint;
-import android.graphics.Shader;
-import android.view.View;
-
-/**
- * This class draws a variable-sized shadow at the top or bottom edge of a view. This is just like
- * a fading edge, except that the shadow color can have an alpha component, whereas a fading edge
- * color must be opaque.
- */
-public class FadingShadow {
-
-    public static final int POSITION_TOP = 0;
-    public static final int POSITION_BOTTOM = 1;
-
-    private static final int SMOOTH_ALGORITHM_INTERPOLATION_POINTS_NUM = 8;
-
-    private Paint mShadowPaint = new Paint();
-    private Matrix mShadowMatrix = new Matrix();
-    private Shader mShadowShader;
-
-    /**
-     * @param shadowColor The color of the shadow, e.g. 0x11000000.
-     */
-    public FadingShadow(int shadowColor) {
-        final int n = SMOOTH_ALGORITHM_INTERPOLATION_POINTS_NUM;
-        float[] positions = new float[n];
-        int[] colors = new int[n];
-        int transparentShadowColor = shadowColor & 0x00FFFFFF;
-        int shadowAlpha = Color.alpha(shadowColor);
-
-        // Piece-wise linear interpolation of the smooth cubic function below.
-        for (int i = 0; i < n; ++i) {
-            float x = (float) i / (n - 1);
-            // Polynomial computation by Estrin's scheme.
-            float value = (1.0f - 2.2f * x) + (1.8f - 0.6f * x) * (x * x);
-
-            positions[i] = x;
-            colors[i] = (Math.round(shadowAlpha * value) << 24) | transparentShadowColor;
-        }
-
-        mShadowShader = new LinearGradient(0, 0, 0, 1, colors, positions, Shader.TileMode.CLAMP);
-
-    }
-
-    /**
-     * Draws a shadow at the top or bottom of a view. This should be called from dispatchDraw() so
-     * the shadow is drawn on top of the view's children.
-     *
-     * @param view The View in which to draw the shadow.
-     * @param canvas The canvas on which to draw.
-     * @param position Where to draw the shadow: either POSITION_TOP or POSITION_BOTTOM.
-     * @param shadowHeight The maximum height of the shadow, in pixels.
-     * @param shadowStrength A value between 0 and 1 indicating the relative size of the shadow. 0
-     *                       means no shadow at all. 1 means a full height shadow.
-     */
-    public void drawShadow(View view, Canvas canvas, int position, float shadowHeight,
-            float shadowStrength) {
-        float scaledShadowHeight = Math.max(0.0f, Math.min(1.0f, shadowStrength)) * shadowHeight;
-        if (scaledShadowHeight < 1.0f) return;
-
-        int left = view.getScrollX();
-        int right = left + view.getRight();
-
-        if (position == POSITION_BOTTOM) {
-            int bottom = view.getScrollY() + view.getBottom() - view.getTop();
-            mShadowMatrix.setScale(1, scaledShadowHeight);
-            mShadowMatrix.postRotate(180);
-            mShadowMatrix.postTranslate(left, bottom);
-            mShadowShader.setLocalMatrix(mShadowMatrix);
-            mShadowPaint.setShader(mShadowShader);
-            canvas.drawRect(left, bottom - scaledShadowHeight, right, bottom, mShadowPaint);
-        } else if (position == POSITION_TOP) {
-            int top = view.getScrollY();
-            mShadowMatrix.setScale(1, scaledShadowHeight);
-            mShadowMatrix.postTranslate(left, top);
-            mShadowShader.setLocalMatrix(mShadowMatrix);
-            mShadowPaint.setShader(mShadowShader);
-            canvas.drawRect(left, top, right, top + scaledShadowHeight, mShadowPaint);
-        }
-    }
-}