Adding a chrome flag to control the touch selection granularity strategy used by Blink.

content/renderer/render_view_impl.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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 745 matching lines @@
     webview()->setMainFrame(main_render_frame_->GetWebFrame());
   }
   main_render_frame_->Initialize();
 
   if (switches::IsTouchDragDropEnabled())
     webview()->settings()->setTouchDragDropEnabled(true);
 
   if (switches::IsTouchEditingEnabled())
     webview()->settings()->setTouchEditingEnabled(true);
 
+  const std::string selection_strategy_str =
+      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+          switches::kTouchTextSelectionStrategy);
+  if (selection_strategy_str == "1") {
+    webview()->settings()->setSelectionStrategy(
+        WebSettings::StrategyDirection);
+  }
+
   if (!params.frame_name.empty())
     webview()->mainFrame()->setName(params.frame_name);
 
   // TODO(davidben): Move this state from Blink into content.
   if (params.window_was_created_with_opener)
     webview()->setOpenedByDOM();
 
   OnSetRendererPrefs(params.renderer_preferences);
 
   if (!params.enable_auto_resize) {
@@ skipping 3225 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content