Revert of Implement Aura side of unified touch text selection for contents

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 73aa11e30b73d2d4f8c4bb8293bc4e191aafe7e8..d38cdc121ccaf36a97929debb65451f6a9135e26 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -2006,20 +2006,10 @@
   if (handling_ime_event_)
     return;
 
-#if defined(USE_AURA)
-  // TODO(mohsen): For now, always send explicit selection IPC notifications for
-  // Aura beucause composited selection updates are not working for webview tags
-  // which regresses IME inside webview. Remove this when composited selection
-  // updates are fixed for webviews. See, http://crbug.com/510568.
-  bool send_ipc = true;
-#else
   // With composited selection updates, the selection bounds will be reported
   // directly by the compositor, in which case explicit IPC selection
   // notifications should be suppressed.
-  bool send_ipc =
-      !blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled();
-#endif
-  if (send_ipc) {
+  if (!blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled()) {
     ViewHostMsg_SelectionBounds_Params params;
     GetSelectionBounds(&params.anchor_rect, &params.focus_rect);
     if (selection_anchor_rect_ != params.anchor_rect ||