Hide the Paste popup when input is received from IME.

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 831f9e1691a06034b7758c7a004287350c6849f8..08a71825d0d7cfa2606a6504105bb3cbae3cc860 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -1684,6 +1684,8 @@ public class ContentViewCore
             hideImeIfNeeded();
             cancelRequestToScrollFocusedEditableNodeIntoView();
         }
+        if (getPastePopup().isShowing())

[jdduke (slow), 2014/07/23 14:35:14]

We shouldn't instantiate a new PastePopup (done by getPastePopup()) just to
check if it's showing.  Please use the existing |hidePastePopup()| method, and
put the method under the if (!gainFocus) branch.

Hmm, actually, do we get a SelectionEvent after we lose focus? Could you check
if there are any events forwarded to onSelectionEvent() at some point in this
sequence?

[Cyan, 2014/07/23 15:41:52]

@jdduke:
We are not getting any SelectionEvent after we lose focus.In fact no event is
being forwarded to SelectionEvent in this sequence.I'm modifying the patch the
way you suggested. Will upload the new patch in sometime.

+            mPastePopupMenu.hide();
         if (mNativeContentViewCore != 0) nativeSetFocus(mNativeContentViewCore, gainFocus);
     }