Adds selection expansion support for Contextual Search.

content/browser/web_contents/web_contents_android.h

Index: content/browser/web_contents/web_contents_android.h
diff --git a/content/browser/web_contents/web_contents_android.h b/content/browser/web_contents/web_contents_android.h
index 6807d06ff2f25f18c502dae12dc3d2aa07a89d54..3236a2333a8a95ef296e213b51ae104c521ed994 100644
--- a/content/browser/web_contents/web_contents_android.h
+++ b/content/browser/web_contents/web_contents_android.h
@@ -72,7 +72,10 @@ class CONTENT_EXPORT WebContentsAndroid
   void ShowImeIfNeeded(JNIEnv* env, jobject obj);
   void ScrollFocusedEditableNodeIntoView(JNIEnv* env, jobject obj);
   void SelectWordAroundCaret(JNIEnv* env, jobject obj);
-
+  void MoveSelectionByCharacterOffset(JNIEnv* env,
+                                      jobject obj,
+                                      jint start_adjust,
+                                      jint end_adjust);
   void InsertCSS(JNIEnv* env, jobject jobj, jstring jcss);
   void EvaluateJavaScript(JNIEnv* env,
                           jobject obj,