Fix Handle above IME issue

Added flag to check if IME state is updated
This will prevent resetting of mFocusPreOSKViewportRect
on onTouchEvent.

So, if cancelRequestToScrollFocusedEditableNodeIntoView()
is triggerred from onTouchEvent()<ACTION_MOVE> and it
happens before onSizeChanged is triggerred, then the
input field will not be scrolled to view.

BUG=393948

Review URL: https://codereview.chromium.org/392943002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283434 0039d316-1c4b-4281-b951-d872f2087c98

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

@@ -1171,10 +1171,12 @@ public class ContentViewCore
     public boolean onTouchEvent(MotionEvent event) {
         TraceEvent.begin("onTouchEvent");
         try {
-            cancelRequestToScrollFocusedEditableNodeIntoView();
-
             int eventAction = event.getActionMasked();
 
+            if (eventAction == MotionEvent.ACTION_DOWN) {
+                cancelRequestToScrollFocusedEditableNodeIntoView();
+            }
+
             if (isSPenSupported(mContext))
                 eventAction = convertSPenEventAction(eventAction);