[WIP] Add support for Android SuggestionSpans when editing text

third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp

Index: third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp
diff --git a/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp b/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp
index 0c7fb5795e80adc76d9cb1cd2c79949553efcf3d..f238e95ebd8aa2edbb24d7dbd9d1ad2d74d0e01d 100644
--- a/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp
+++ b/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp
@@ -532,13 +532,16 @@ void CompositeEditCommand::replaceTextInNode(Text* node,
                                              const String& replacementText) {
   // DeleteFromTextNodeCommand and InsertIntoTextNodeCommand are never
   // aborted.
-  applyCommandToComposite(
-      DeleteFromTextNodeCommand::create(node, offset, count),
-      ASSERT_NO_EDITING_ABORT);
+
+  // Insert must happen before delete to preserve markers correctly
+  // See algorithm in https://dom.spec.whatwg.org/#concept-cd-replace
   if (!replacementText.isEmpty())
     applyCommandToComposite(
         InsertIntoTextNodeCommand::create(node, offset, replacementText),
         ASSERT_NO_EDITING_ABORT);
+  applyCommandToComposite(DeleteFromTextNodeCommand::create(
+                              node, offset + replacementText.length(), count),
+                          ASSERT_NO_EDITING_ABORT);
 }
 
 Position CompositeEditCommand::replaceSelectedTextInNode(const String& text) {