Upstream base implementations of TabModel, TabModelSelector, and TabModelObserver.

chrome/android/java/src/org/chromium/chrome/browser/util/MathUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/util/MathUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/MathUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/util/MathUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..67d8e9ae18afeef54a30753d0d83685e4ddc431c
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/MathUtils.java
@@ -0,0 +1,49 @@
+// Copyright 2014 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.util;
+
+/**
+ * Contains various math utilities used throughout Chrome Mobile.
+ */
+public class MathUtils {
+
+    private MathUtils() {}
+
+    /**
+     * Returns the passed in value if it resides within the specified range (inclusive).  If not,
+     * it will return the closest boundary from the range.  The ordering of the boundary values does
+     * not matter.
+     *
+     * @param value The value to be compared against the range.
+     * @param a First boundary range value.
+     * @param b Second boundary range value.
+     * @return The passed in value if it is within the range, otherwise the closest boundary value.
+     */
+    public static int clamp(int value, int a, int b) {
+        int min = (a > b) ? b : a;
+        int max = (a > b) ? a : b;
+        if (value < min) value = min;
+        else if (value > max) value = max;
+        return value;
+    }
+
+    /**
+     * Returns the passed in value if it resides within the specified range (inclusive).  If not,
+     * it will return the closest boundary from the range.  The ordering of the boundary values does
+     * not matter.
+     *
+     * @param value The value to be compared against the range.
+     * @param a First boundary range value.
+     * @param b Second boundary range value.
+     * @return The passed in value if it is within the range, otherwise the closest boundary value.
+     */
+    public static float clamp(float value, float a, float b) {
+        float min = (a > b) ? b : a;
+        float max = (a > b) ? a : b;
+        if (value < min) value = min;
+        else if (value > max) value = max;
+        return value;
+    }
+}