Refactor ContentViewClient (3/6)

ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java

Index: ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
diff --git a/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java b/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
index 82d09ea85aba6095b160d67ec5238c93b1586bb1..05c2dfa955bf6349dd955751b5f34bf4431610d8 100644
--- a/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
+++ b/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
@@ -8,6 +8,7 @@ import android.content.ClipData;
 import android.graphics.Bitmap;
 import android.os.Build;
 import android.view.View;
+import android.view.View.MeasureSpec;
 import android.view.ViewGroup;
 import android.widget.FrameLayout.LayoutParams;
 import android.widget.ImageView;
@@ -25,6 +26,10 @@ public abstract class ViewAndroidDelegate {
     // TODO(hush): use View#DRAG_FLAG_GLOBAL when Chromium starts to build with API 24.
     private static final int DRAG_FLAG_GLOBAL = 1 << 8;
 
+    // Default value to signal that the ContentView's size should not be overridden.
+    private static final int UNSPECIFIED_MEASURE_SPEC =
+            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+
     /**
      * @return An anchor view that can be used to anchor decoration views like Autofill popup.
      */
@@ -105,6 +110,55 @@ public abstract class ViewAndroidDelegate {
     }
 
     /**
+     * Returns the bottom system window inset in pixels. The system window inset represents the area
+     * of a full-screen window that is partially or fully obscured by the status bar, navigation
+     * bar, IME or other system windows.
+     * @return The bottom system window inset.
+     */
+    public int getSystemWindowInsetBottom() {
+        return 0;
+    }
+
+    @CalledByNative
+    public void onBackgroundColorChanged(int color) { }
+
+    /**
+     * Notifies the client of the position of the top controls.
+     * @param topControlsOffsetY The Y offset of the top controls in physical pixels.
+     * @param topContentOffsetY The Y offset of the content in physical pixels.
+     */
+    public void onTopControlsChanged(float topControlsOffsetY, float topContentOffsetY) { }
+
+    /**
+     * Notifies the client of the position of the bottom controls.
+     * @param bottomControlsOffsetY The Y offset of the bottom controls in physical pixels.
+     * @param bottomContentOffsetY The Y offset of the content in physical pixels.
+     */
+    public void onBottomControlsChanged(float bottomControlsOffsetY, float bottomContentOffsetY) { }
+
+    /**
+     * ContentViewClient users can return a custom value to override the width of
+     * the ContentView. By default, this method returns MeasureSpec.UNSPECIFIED, which
+     * indicates that the value should not be overridden.
+     *
+     * @return The desired width of the ContentView.
+     */
+    public int getDesiredWidthMeasureSpec() {
+        return UNSPECIFIED_MEASURE_SPEC;
+    }
+
+    /**
+     * ContentViewClient users can return a custom value to override the height of
+     * the ContentView. By default, this method returns MeasureSpec.UNSPECIFIED, which
+     * indicates that the value should not be overridden.
+     *
+     * @return The desired height of the ContentView.
+     */
+    public int getDesiredHeightMeasureSpec() {
+        return UNSPECIFIED_MEASURE_SPEC;
+    }
+
+    /**
      * @return container view that the anchor views are added to. May be null.
      */
     public abstract ViewGroup getContainerView();