[xfa] Propagate the xfa change data for text to JS and back.

This CL adds the necessary plumbing to propagate the change information
for a text widget from FWL out to JS and handle the returned value as
necessary.

Bug: pdfium:1066
Change-Id: I78fd81761b90294f1836e9f09dba12ed238963cc
Reviewed-on: https://pdfium-review.googlesource.com/33070
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/xfa/fde/cfde_texteditengine_unittest.cpp b/xfa/fde/cfde_texteditengine_unittest.cpp
index 123d16ce4b..c5efe529e6 100644
--- a/xfa/fde/cfde_texteditengine_unittest.cpp
+++ b/xfa/fde/cfde_texteditengine_unittest.cpp
@@ -21,7 +21,8 @@ class CFDE_TextEditEngineTest : public testing::Test {
     void NotifyTextFull() override { text_is_full = true; }
 
     void OnCaretChanged() override {}
-    void OnTextChanged(const WideString& prevText) override {}
+    void OnTextWillChange(CFDE_TextEditEngine::TextChange* change) override {}
+    void OnTextChanged() override {}
     void OnSelChanged() override {}
     bool OnValidate(const WideString& wsText) override {
       return !fail_validation;