Reland "Refactor ContentViewClient (4/6)"

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 9a9d89beedcbc99147bb2ac2c28e1db5d6181a1a..bf674594c36a2faac4d29c4d974a04defb64d8e7 100644
--- a/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
+++ b/ui/android/java/src/org/chromium/ui/base/ViewAndroidDelegate.java
@@ -5,6 +5,7 @@
 package org.chromium.ui.base;
 
 import android.content.ClipData;
+import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Build;
 import android.view.View;
@@ -13,18 +14,26 @@ import android.widget.FrameLayout.LayoutParams;
 import android.widget.ImageView;
 
 import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 
+import java.net.URISyntaxException;
+
 /**
  * Class to acquire, position, and remove anchor views from the implementing View.
  */
 @JNINamespace("ui")
 public abstract class ViewAndroidDelegate {
+    private static final String TAG = "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;
 
+    private static final String GEO_SCHEME = "geo";
+    private static final String TEL_SCHEME = "tel";
+    private static final String MAILTO_SCHEME = "mailto";
+
     /**
      * @return An anchor view that can be used to anchor decoration views like Autofill popup.
      */
@@ -105,6 +114,57 @@ public abstract class ViewAndroidDelegate {
     }
 
     /**
+     * Called whenever the background color of the page changes as notified by Blink.
+     * @param color The new ARGB color of the page background.
+     */
+    @CalledByNative
+    public void onBackgroundColorChanged(int color) {}
+
+    /**
+     * Notify 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.
+     */
+    @CalledByNative
+    public void onTopControlsChanged(float topControlsOffsetY, float topContentOffsetY) {}
+
+    /**
+     * Notify 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.
+     */
+    @CalledByNative
+    public void onBottomControlsChanged(float bottomControlsOffsetY, float bottomContentOffsetY) {}
+
+    /**
+     * Called when a new content intent is requested to be started.
+     * Invokes {@link #startContentIntent(Intent, String, boolean)} only if the parsed
+     * intent is valid and the scheme is acceptable.
+     */
+    @CalledByNative
+    private void onStartContentIntent(String intentUrl, boolean isMainFrame) {
+        Intent intent;
+        try {
+            intent = Intent.parseUri(intentUrl, Intent.URI_INTENT_SCHEME);
+        } catch (URISyntaxException e) {
+            Log.d(TAG, "Bad URI %s", intentUrl, e);
+            return;
+        }
+        String scheme = intent.getScheme();
+        if (!(GEO_SCHEME.equals(scheme) || TEL_SCHEME.equals(scheme)
+                    || MAILTO_SCHEME.equals(scheme))) {
+            Log.d(TAG, "Invalid scheme for URI %s", intentUrl);
+            return;
+        }
+        startContentIntent(intent, intentUrl, isMainFrame);
+    }
+
+    /**
+     * Start a new content intent.
+     */
+    public void startContentIntent(Intent intent, String intentUrl, boolean isMainFrame) {}
+
+    /**
      * @return container view that the anchor views are added to. May be null.
      */
     @CalledByNative