added scale animation for context menu

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
index cd508545aa7a47b1b2f4e3f3a30fdb72ef67c7fa..3a83337abc41d32191cf72c6287bfdfa5bc574b2 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
@@ -121,6 +121,8 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
                     shareImageDirectly(ShareHelper.getLastShareComponentName());
                 }
             });
+            ((TabularContextMenuUi) menuUi)

[Theresa, 2017/05/24 17:53:33]

Instead of casting here, let's change line 118 to:

final TabularContextMenuUi menuUi = ...

[Daniel Park, 2017/05/24 19:44:38]

Done.

+                    .setRenderCoordinates(contentViewCore.getRenderCoordinates());
             menuUi.displayMenu(mActivity, mCurrentContextMenuParams, items, mCallback, mOnMenuShown,
                     mOnMenuClosed);
             if (mCurrentContextMenuParams.isImage()) {
@@ -134,7 +136,7 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
             return;
         }
 
-        // The Platform Context Menu requires the listener within this hepler since this helper and
+        // The Platform Context Menu requires the listener within this helper since this helper and
         // provides context menu for us to show.
         view.setOnCreateContextMenuListener(this);
         if (view.showContextMenu()) {