Reland: Implement Aura side of unified touch text selection for contents

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 "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 2009 matching lines @@
   *focus = focus_webrect;
   *anchor = anchor_webrect;
 }
 
 void RenderWidget::UpdateSelectionBounds() {
   if (!webwidget_)
     return;
   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.
-  if (!blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled()) {
+  bool send_ipc =
+      !blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled();
+#endif
+  if (send_ipc) {
     ViewHostMsg_SelectionBounds_Params params;
     GetSelectionBounds(&params.anchor_rect, &params.focus_rect);
     if (selection_anchor_rect_ != params.anchor_rect ||
         selection_focus_rect_ != params.focus_rect) {
       selection_anchor_rect_ = params.anchor_rect;
       selection_focus_rect_ = params.focus_rect;
       webwidget_->selectionTextDirection(params.focus_dir, params.anchor_dir);
       params.is_anchor_first = webwidget_->isSelectionAnchorFirst();
       Send(new ViewHostMsg_SelectionBoundsChanged(routing_id_, params));
     }
@@ skipping 424 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content