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..ee78dd8588dd98a0e84dc7db54c7f4067c4f2a6e
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/InsetConsumerView.java
@@ -0,0 +1,87 @@
+// 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;
+
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.content.browser.ContentViewCore;
+
+/**
+ * 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 TabModelSelector mTabModelSelector;
+
+    /**
+     * Creates an {@link InsetConsumerView}.
+     *
+     * @param context The Context to create this {@link InsetConsumerView} in.
+     */
+    public InsetConsumerView(Context context) {
+        super(context);
+    }
+
+    /**
+     * 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);
+    }
+
+    /**
+     * Sets the {@link TabModelSelector} that will be queried for information
+     * about the state of the system.
+     *
+     * @param tabModelSelector A {@link TabModelSelector} that represents the
+     *            state of the system.
+     */
+    public void setTabModelSelector(TabModelSelector tabModelSelector) {
+        mTabModelSelector = tabModelSelector;
+    }
+
+    @SuppressWarnings("deprecation")
+    @Override
+    protected boolean fitSystemWindows(Rect insets) {
+        // For Lollipop and above, onApplyWindowInsets will set the insets on
+        // ContentViewCore.
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP
+                && mTabModelSelector != null && mTabModelSelector.getCurrentTab() != null) {
+            ContentViewCore cvc = mTabModelSelector.getCurrentTab().getContentViewCore();
+            if (cvc != null) {
+                cvc.setWindowInsets(insets.left, insets.top, insets.right, insets.bottom);
+            }
+        }
+        return super.fitSystemWindows(insets);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
+    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
+        if (mTabModelSelector != null && mTabModelSelector.getCurrentTab() != null) {
+            ContentViewCore cvc = mTabModelSelector.getCurrentTab().getContentViewCore();
+            if (cvc != null) {
+                cvc.setWindowInsets(insets.getSystemWindowInsetLeft(),
+                        insets.getSystemWindowInsetTop(),
+                        insets.getSystemWindowInsetRight(),
+                        insets.getSystemWindowInsetBottom());
+            }
+        }
+        return super.onApplyWindowInsets(insets);
+    }
+}