Label selection experiment

ui/gfx/render_text_mac.mm

 // 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/gfx/render_text_mac.h"
 
 #import <AppKit/AppKit.h>
 #include <ApplicationServices/ApplicationServices.h>
 #include <CoreText/CoreText.h>
 
@@ skipping 95 matching lines @@
 SizeF RenderTextMac::GetStringSizeF() {
   EnsureLayout();
   return string_size_;
 }
 
 SelectionModel RenderTextMac::FindCursorPosition(const Point& point) {
   // TODO(asvitkine): Implement this. http://crbug.com/131618
   return SelectionModel();
 }
 
+bool RenderTextMac::IsSelectionSupported() const {
+  return false;
+}
+
 std::vector<RenderText::FontSpan> RenderTextMac::GetFontSpansForTesting() {
   EnsureLayout();
   if (!runs_valid_)
     ComputeRuns();
 
   std::vector<RenderText::FontSpan> spans;
   for (size_t i = 0; i < runs_.size(); ++i) {
     const CFRange cf_range = CTRunGetStringRange(runs_[i].ct_run);
     const Range range(cf_range.location, cf_range.location + cf_range.length);
     spans.push_back(RenderText::FontSpan(
@@ skipping 328 matching lines @@
   // TODO(karandeepb): This is not invoked on any codepath currently. Style the
   // returned text if need be.
   if (obscured())
     return false;
 
   decorated_text->text = GetTextFromRange(range);
   return true;
 }
 
 }  // namespace gfx