Don't send updated state in FinishComposingText and DeleteSurroundingText.

After calling these method, return values of TextInputClient is not
updated.
This CL removes the text input state update timer when calling the
methods to prevent send a false state.

Bug: 897691
Test: Ran on DUT
Change-Id: I7fdb7f8038391f7e9433ad1de0e0607232e2e890
Reviewed-on: https://chromium-review.googlesource.com/c/1319396Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: Yuichiro Hanada <yhanada@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605845}

chrome/browser/chromeos/arc/input_method_manager/input_connection_impl.cc

@@ -116,8 +116,6 @@ void InputConnectionImpl::CommitText(const base::string16& text,
 }
 
 void InputConnectionImpl::DeleteSurroundingText(int before, int after) {
-  StartStateUpdateTimer();
-
   if (before == 0 && after == 0) {
     // This should be no-op.
     // Return the current state immediately.
@@ -177,8 +175,6 @@ void InputConnectionImpl::SetComposingText(
   // so 0 means the cursor should be just before the last character of the text.
   new_cursor_pos += text.length() - 1;
 
-  StartStateUpdateTimer();
-
   const int selection_start = new_selection_range
                                   ? new_selection_range.value().start()
                                   : new_cursor_pos;