Support InputMethodManager#updateCursorAnchorInfo for Android 5.0 (C++ version)

content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java

Index: content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java b/content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java
index d3f14cf6423be7e60d96f9548fce08b54ecd930e..6015060aa930e99d43012bdab9e92c7a6f7b0f53 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/ImeAdapter.java
@@ -16,7 +16,10 @@ import android.text.style.UnderlineSpan;
 import android.view.KeyCharacterMap;
 import android.view.KeyEvent;
 import android.view.View;
+import android.view.inputmethod.CursorAnchorInfo;
 import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputConnection;
+import android.view.inputmethod.InputMethodManager;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
@@ -566,6 +569,17 @@ public class ImeAdapter {
     }
 
     /**
+     * Send a request to the native counterpart to call back
+     * {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} when necessary.
+     * @param cursorUpdateMode The flag passed to {@link InputConnection#requestCursorUpdates(int)}.
+     * @return Whether the native counterpart of ImeAdapter received the call.
+     */
+    boolean requestCursorUpdates(int cursorUpdateMode) {
+        if (mNativeImeAdapterAndroid == 0) return false;
+        return nativeRequestCursorUpdates(mNativeImeAdapterAndroid, cursorUpdateMode);
+    }
+
+    /**
      * Send a request to the native counterpart to unselect text.
      * @return Whether the native counterpart of ImeAdapter received the call.
      */
@@ -623,6 +637,14 @@ public class ImeAdapter {
     }
 
     @CalledByNative
+    private void updateCursorAnchorInfo(Object cursorAnchorInfo) {
+        if (cursorAnchorInfo instanceof CursorAnchorInfo) {
+            mInputMethodManagerWrapper.updateCursorAnchorInfo(mViewEmbedder.getAttachedView(),
+                    (CursorAnchorInfo) cursorAnchorInfo);
+        }
+    }
+
+    @CalledByNative
     private void populateUnderlinesFromSpans(CharSequence text, long underlines) {
         if (!(text instanceof SpannableString)) return;
 
@@ -686,6 +708,9 @@ public class ImeAdapter {
     private native void nativeDeleteSurroundingText(long nativeImeAdapterAndroid,
             int before, int after);
 
+    private native boolean nativeRequestCursorUpdates(long nativeImeAdapterAndroid,
+            int cursorUpdateMode);
+
     private native void nativeUnselect(long nativeImeAdapterAndroid);
     private native void nativeSelectAll(long nativeImeAdapterAndroid);
     private native void nativeCut(long nativeImeAdapterAndroid);