Resize only the virtual viewport when the OSK triggers a resize.

chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java b/chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java
new file mode 100644
index 0000000000000000000000000000000000000000..f0bf2e17379857ace2be692d1e681c6280e0c522
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java
@@ -0,0 +1,99 @@
+// Copyright 2016 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;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.graphics.Rect;
+import android.os.Build;
+import android.util.AttributeSet;
+import android.view.WindowInsets;
+import android.widget.FrameLayout;
+
+/**
+ * The purpose of this view is to consume the insets (OSK resizes, status bar).
+ * It stores the value of the insets in ContentViewCore so that size of things
+ * like the OSK can be known.
+ */
+public class InsetConsumerView extends FrameLayout {
+
+    private Rect mWindowInsets;
+
+    /**
+     * Creates an {@link InsetConsumerView}.
+     *
+     * @param context The Context to create this {@link InsetConsumerView} in.
+     */
+    public InsetConsumerView(Context context) {
+        super(context);
+        mWindowInsets = new Rect();
+    }
+
+    /**
+     * Creates an {@link InsetConsumerView}.
+     *
+     * @param context The Context to create this {@link InsetConsumerView} in.
+     * @param attrs The AttributeSet used to create this
+     *            {@link InsetConsumerView}.
+     */
+    public InsetConsumerView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mWindowInsets = new Rect();
+    }
+
+    /**
+     * Returns the left {@link WindowInsets} in pixels.
+     *
+     * @return The left system window inset.
+     */
+    public int getSystemWindowInsetsLeft() {
+        return mWindowInsets.left;
+    }
+
+    /**
+     * Returns the top {@link WindowInsets} in pixels.
+     *
+     * @return The top system window inset.
+     */
+    public int getSystemWindowInsetsTop() {
+        return mWindowInsets.top;
+    }
+
+    /**
+     * Returns the right {@link WindowInsets} in pixels.
+     *
+     * @return The right system window inset.
+     */
+    public int getSystemWindowInsetsRight() {
+        return mWindowInsets.right;
+    }
+
+    /**
+     * Returns the bottom {@link WindowInsets} in pixels.
+     *
+     * @return The bottom system window inset.
+     */
+    public int getSystemWindowInsetsBottom() {
+        return mWindowInsets.bottom;
+    }
+
+    @SuppressWarnings("deprecation")
+    @Override
+    protected boolean fitSystemWindows(Rect insets) {
+        // For Lollipop and above, onApplyWindowInsets will set the insets.
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            mWindowInsets.set(insets.left, insets.top, insets.right, insets.bottom);
+        }
+        return super.fitSystemWindows(insets);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
+    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
+        mWindowInsets.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(),
+                insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
+        return super.onApplyWindowInsets(insets);
+    }
+}