Reland: Update TextSelection for non-user initiated events

content/renderer/render_widget.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1611 matching lines @@
     return;
 
 #if BUILDFLAG(ENABLE_PLUGINS)
   if (focused_pepper_plugin_) {
     focused_pepper_plugin_->render_frame()->OnImeSetComposition(
         text, underlines, selection_start, selection_end);
     return;
   }
 #endif
   ImeEventGuard guard(this);
+  input_handler_->set_ime_composition_replacement(replacement_range.IsValid());
   blink::WebInputMethodController* controller = GetInputMethodController();
   if (!controller ||
       !controller->SetComposition(
           WebString::FromUTF16(text),
           WebVector<WebCompositionUnderline>(underlines),
           replacement_range.IsValid()
               ? WebRange(replacement_range.start(), replacement_range.length())
               : WebRange(),
           selection_start, selection_end)) {
     // If we failed to set the composition text, then we need to let the browser
     // process to cancel the input method's ongoing composition session, to make
     // sure we are in a consistent state.
     Send(new InputHostMsg_ImeCancelComposition(routing_id()));
   }
+  input_handler_->set_ime_composition_replacement(false);
   UpdateCompositionInfo(false /* not an immediate request */);
 }
 
 void RenderWidget::OnImeCommitText(
     const base::string16& text,
     const std::vector<WebCompositionUnderline>& underlines,
     const gfx::Range& replacement_range,
     int relative_cursor_pos) {
   if (!ShouldHandleImeEvents())
     return;
@@ skipping 723 matching lines @@
     // browser side (https://crbug.com/669219).
     // If there is no WebFrameWidget, then there will be no
     // InputMethodControllers for a WebLocalFrame.
     return nullptr;
   }
   return static_cast<blink::WebFrameWidget*>(GetWebWidget())
       ->GetActiveWebInputMethodController();
 }
 
 }  // namespace content