Provide an accessibility tree snapshot

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 361608254ff72b64ebb1e20b42ab0f5b14c887f3..2646c470e1464c5b1cc5a84e18e546adc7dd08b7 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
@@ -13,6 +13,8 @@ import android.os.Parcelable;
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
 import org.chromium.base.VisibleForTesting;
+import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content.browser.RenderCoordinates;
 import org.chromium.content_public.browser.AccessibilitySnapshotCallback;
 import org.chromium.content_public.browser.AccessibilitySnapshotNode;
 import org.chromium.content_public.browser.JavaScriptCallback;
@@ -324,7 +326,9 @@ import java.util.UUID;
 
     @Override
     public void requestAccessibilitySnapshot(AccessibilitySnapshotCallback callback) {
-        nativeRequestAccessibilitySnapshot(mNativeWebContentsAndroid, callback);
+        RenderCoordinates r = ContentViewCore.fromWebContents(this).getRenderCoordinates();

[Ted C, 2015/07/21 00:35:48]

ContentViewCore is a layer above this, so we should be passing in the offset and
scroll instead of pulling from CVC.

[sgurun-gerrit only, 2015/07/21 20:22:15]

Done.

+        nativeRequestAccessibilitySnapshot(mNativeWebContentsAndroid, callback,
+                r.getContentOffsetYPix(), r.getScrollX());
     }
 
     @Override
@@ -425,7 +429,7 @@ import java.util.UUID;
             long nativeWebContentsAndroid);
     private native int nativeGetThemeColor(long nativeWebContentsAndroid);
     private native void nativeRequestAccessibilitySnapshot(long nativeWebContentsAndroid,
-            AccessibilitySnapshotCallback callback);
+            AccessibilitySnapshotCallback callback, float offsetY, float scrollX);
     private native void nativeResumeMediaSession(long nativeWebContentsAndroid);
     private native void nativeSuspendMediaSession(long nativeWebContentsAndroid);
 }