Remove focus on back key press if focus is on url bar.

content/shell/android/java/src/org/chromium/content_shell/Shell.java

Index: content/shell/android/java/src/org/chromium/content_shell/Shell.java
diff --git a/content/shell/android/java/src/org/chromium/content_shell/Shell.java b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
index 5223bfe66c4440b25eda13c2999fde6e95cdf11d..5940b5b2ad30ddcfb9ac72f06a20a9a90d9b174d 100644
--- a/content/shell/android/java/src/org/chromium/content_shell/Shell.java
+++ b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
@@ -166,6 +166,16 @@ public class Shell extends LinearLayout {
                 }
             }
         });
+        mUrlTextView.setOnKeyListener(new OnKeyListener() {
+            @Override
+            public boolean onKey(View v, int keyCode, KeyEvent event) {
+                if (keyCode == KeyEvent.KEYCODE_BACK) {
+                    mContentViewCore.getContainerView().requestFocus();
+                    return true;
+                }
+                return false;
+            }
+        });
     }
 
     /**