[WIP] Add support for Android SuggestionSpans when editing text

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 9ceb7970c31e94dd094ee3417c2452f0205ae751..c6ce1bd3ebfc238a245198621c95dca3bdc65573 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -587,6 +587,12 @@ bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(InputMsg_ImeCommitText, OnImeCommitText)
     IPC_MESSAGE_HANDLER(InputMsg_ImeFinishComposingText,
                         OnImeFinishComposingText)
+    IPC_MESSAGE_HANDLER(InputMsg_ImeApplySuggestionReplacement,
+                        OnImeApplySuggestionReplacement)
+    IPC_MESSAGE_HANDLER(InputMsg_ImeDeleteSuggestionHighlight,
+                        OnImeDeleteSuggestionHighlight)
+    IPC_MESSAGE_HANDLER(InputMsg_ImeCloseSuggestionMenu,
+                        OnImeCloseSuggestionMenu)
     IPC_MESSAGE_HANDLER(InputMsg_MouseCaptureLost, OnMouseCaptureLost)
     IPC_MESSAGE_HANDLER(InputMsg_SetEditCommandsForNextKeyEvent,
                         OnSetEditCommandsForNextKeyEvent)
@@ -1075,6 +1081,25 @@ void RenderWidget::UpdateTextInputStateInternal(bool show_virtual_keyboard,
   }
 }
 
+void RenderWidget::HandlePotentialTextSuggestionTap() {
+  blink::WebInputMethodController* controller = GetInputMethodController();
+  if (!controller)
+    return;
+
+  WebVector<blink::WebTextSuggestionInfo> suggestion_infos =
+      controller->getTextSuggestionInfosUnderCaret();
+
+  if (suggestion_infos.size() == 0)
+    return;
+
+  // The composition is now on the suggestion range highlight
+  UpdateCompositionInfo(false /* not an immediate request */);
+
+  Send(new InputHostMsg_ShowTextSuggestionMenu(
+      routing_id(), std::vector<blink::WebTextSuggestionInfo>(
+                        suggestion_infos.begin(), suggestion_infos.end())));
+}
+
 bool RenderWidget::WillHandleGestureEvent(const blink::WebGestureEvent& event) {
   possible_drag_event_info_.event_source =
       ui::DragDropTypes::DRAG_EVENT_SOURCE_TOUCH;
@@ -1613,6 +1638,25 @@ void RenderWidget::OnImeFinishComposingText(bool keep_selection) {
   UpdateCompositionInfo(false /* not an immediate request */);
 }
 
+void RenderWidget::OnImeApplySuggestionReplacement(int document_marker_id,
+                                                   int suggestion_index) {
+  if (auto* controller = GetInputMethodController()) {
+    controller->applySuggestionReplacement(document_marker_id,
+                                           suggestion_index);
+  }
+}
+
+void RenderWidget::OnImeDeleteSuggestionHighlight() {
+  if (auto* controller = GetInputMethodController()) {
+    controller->deleteSuggestionHighlight();
+  }
+}
+
+void RenderWidget::OnImeCloseSuggestionMenu() {
+  if (auto* controller = GetInputMethodController())
+    controller->closeSuggestionMenu();
+}
+
 void RenderWidget::OnDeviceScaleFactorChanged() {
   if (!compositor_)
     return;