Take a snapshot of the AXTree

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java

Index: content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
index 2e53449a720b4dc0b79468dac988e0ed80c26580..97f9010dcf67e73c70363915643c7063b6a8f2d5 100644
--- a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
+++ b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
@@ -8,11 +8,13 @@ import android.graphics.Color;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
+import org.chromium.content_public.browser.AXTreeSnapshotCallback;
 import org.chromium.content_public.browser.JavaScriptCallback;
 import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.NavigationTransitionDelegate;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.WebContentsObserver;
+import org.chromium.ui.AXNodeData;
 
 /**
  * The WebContentsImpl Java wrapper to allow communicating with the native WebContentsImpl
@@ -329,6 +331,27 @@ import org.chromium.content_public.browser.WebContentsObserver;
     }
 
     @Override
+    public void requestAXTreeSnapshot(AXTreeSnapshotCallback callback) {
+        nativeRequestAXTreeSnapshot(mNativeWebContentsAndroid, callback);
+    }
+
+    @CalledByNative
+    private static void onAXTreeSnapshot(AXNodeData root, AXTreeSnapshotCallback callback) {
+        callback.onAXTreeSnapshot(root);
+    }
+
+    @CalledByNative
+    private static void addAXNodeAsChild(AXNodeData parent, AXNodeData child) {
+        parent.addChild(child);
+    }
+
+    @CalledByNative
+    private static AXNodeData createAXNode(int id, int x, int y, int scrollX, int scrollY,

[dmazzoni, 2015/04/10 19:20:00]

This makes me think that AXNodeData (or whatever we call it) should be defined
in org.chromium.content.browser.webcontents, not in org.chromium.ui.

[sgurun-gerrit only, 2015/04/10 23:24:50]

Done.

+            int width, int height, String text, String className) {
+        return new AXNodeData(id, x, y, scrollX, scrollY, width, height, text, className);
+    }
+
+    @Override
     public void addObserver(WebContentsObserver observer) {
         assert mNativeWebContentsAndroid != 0;
         if (mObserverProxy == null) mObserverProxy = new WebContentsObserverProxy(this);
@@ -390,4 +413,6 @@ import org.chromium.content_public.browser.WebContentsObserver;
     private native boolean nativeHasAccessedInitialDocument(
             long nativeWebContentsAndroid);
     private native int nativeGetThemeColor(long nativeWebContentsAndroid);
+    private native void nativeRequestAXTreeSnapshot(long nativeWebContentsAndroid,
+            AXTreeSnapshotCallback callback);
 }