[Android] Add enhanced bookmarks grid/list view experiment.

chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc

Index: chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc
diff --git a/chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc b/chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc
index 96c2f5be0a3aab92cb4ec2108c68461af45d2dc8..401e0fb59a64197b8c483c9cab0a493411a7063b 100644
--- a/chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc
+++ b/chrome/browser/enhanced_bookmarks/android/enhanced_bookmarks_bridge.cc
@@ -23,6 +23,7 @@
 #include "components/bookmarks/common/android/bookmark_id.h"
 #include "components/bookmarks/common/android/bookmark_type.h"
 #include "components/enhanced_bookmarks/enhanced_bookmark_model.h"
+#include "components/enhanced_bookmarks/enhanced_bookmark_utils.h"
 #include "components/enhanced_bookmarks/image_record.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ -313,6 +314,10 @@ bool EnhancedBookmarksBridge::IsEditable(const BookmarkNode* node) const {
         bookmarks::prefs::kEditBookmarksEnabled);
 }
 
+static jint GetDefaultViewMode(JNIEnv* env, jclass jcaller) {
+  return enhanced_bookmarks::GetDefaultViewMode();
+}
+
 static jlong Init(JNIEnv* env, jobject obj, jobject j_profile) {
   return reinterpret_cast<jlong>(new EnhancedBookmarksBridge(
         env, obj, ProfileAndroid::FromProfileAndroid(j_profile)));