Views:: Make Labels support text selection.

ui/views/controls/textfield/textfield.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 "ui/views/controls/textfield/textfield.h"
 
 #include <string>
 #include <utility>
 
 #include "base/strings/utf_string_conversions.h"
@@ skipping 241 matching lines @@
       drag_start_display_offset_(0),
       touch_handles_hidden_due_to_scroll_(false),
       use_focus_ring_(ui::MaterialDesignController::IsSecondaryUiMaterial()),
       weak_ptr_factory_(this) {
   set_context_menu_controller(this);
   set_drag_controller(this);
   GetRenderText()->SetFontList(GetDefaultFontList());
   View::SetBorder(std::unique_ptr<Border>(new FocusableBorder()));
   SetFocusBehavior(FocusBehavior::ALWAYS);
 
-// On Linux, middle click should update or paste the selection clipboard.
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
-  selection_controller_.set_handles_selection_clipboard(true);
-#endif
-
   // These allow BrowserView to pass edit commands from the Chrome menu to us
   // when we're focused by simply asking the FocusManager to
   // ProcessAccelerator() with the relevant accelerators.
   AddAccelerator(ui::Accelerator(ui::VKEY_X, ui::EF_CONTROL_DOWN));
   AddAccelerator(ui::Accelerator(ui::VKEY_C, ui::EF_CONTROL_DOWN));
   AddAccelerator(ui::Accelerator(ui::VKEY_V, ui::EF_CONTROL_DOWN));
 }
 
 Textfield::~Textfield() {
   if (GetInputMethod()) {
@@ skipping 1492 matching lines @@
 // Textfield, SelectionControllerDelegate overrides:
 
 gfx::RenderText* Textfield::GetRenderTextForSelectionController() {
   return GetRenderText();
 }
 
 bool Textfield::IsReadOnly() const {
   return read_only();
 }
 
+bool Textfield::SupportsDrag() const {
+  return true;
+}
+
 void Textfield::SetTextBeingDragged(bool value) {
   initiating_drag_ = value;
 }
 
 int Textfield::GetViewHeight() const {
   return height();
 }
 
 int Textfield::GetViewWidth() const {
   return width();
@@ skipping 259 matching lines @@
 }
 
 void Textfield::OnCursorBlinkTimerFired() {
   DCHECK(ShouldBlinkCursor());
   gfx::RenderText* render_text = GetRenderText();
   render_text->set_cursor_visible(!render_text->cursor_visible());
   RepaintCursor();
 }
 
 }  // namespace views