[Android Bookmarks] Hide search view when system back is pressed

chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java b/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
index a20fdae2d4dcfd4b8dc05f3adc4628aded561431..b526a045231b543499628dfb3fc6762464b5a8b3 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
@@ -215,6 +215,11 @@ public class BookmarkManager implements BookmarkDelegate, SearchDelegate {
             return true;
         }
 
+        if (mToolbar.isSearching()) {
+            mToolbar.hideSearchView();
+            return true;
+        }
+
         if (!mStateStack.empty()) {
             mStateStack.pop();
             if (!mStateStack.empty()) {