Enable touch based selection and editing for webpages behind a flag.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index b78531b24dcc3d46317e6e1fb898677aa5908944..adae144f7d6ffd390b5edf64d2bac0c7ee9cc437 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -761,6 +761,9 @@ void RenderViewImpl::Initialize(RenderViewImplParams* params) {
   if (command_line.HasSwitch(switches::kEnableTouchDragDrop))
     webview()->settings()->setTouchDragDropEnabled(true);
 
+  if (command_line.HasSwitch(switches::kEnableTouchEditing))
+    webview()->settings()->setTouchEditingEnabled(true);
+
   if (!params->frame_name.empty())
     webview()->mainFrame()->setName(params->frame_name);
   webview()->settings()->setMinimumTimerInterval(
@@ -1101,6 +1104,7 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
         ViewMsg_GetSerializedHtmlDataForCurrentPageWithLocalLinks,
         OnGetSerializedHtmlDataForCurrentPageWithLocalLinks)
     IPC_MESSAGE_HANDLER(ViewMsg_ContextMenuClosed, OnContextMenuClosed)
+    IPC_MESSAGE_HANDLER(ViewMsg_ShowContextMenu, OnShowContextMenu)
     // TODO(viettrungluu): Move to a separate message filter.
     IPC_MESSAGE_HANDLER(ViewMsg_SetHistoryLengthAndPrune,
                         OnSetHistoryLengthAndPrune)
@@ -4763,6 +4767,7 @@ void RenderViewImpl::SyncSelectionIfRequired() {
     selection_range_ = range;
     Send(new ViewHostMsg_SelectionChanged(routing_id_, text, offset, range));
   }
+  UpdateSelectionBounds();
 }
 
 GURL RenderViewImpl::GetAlternateErrorPageURL(const GURL& failed_url,
@@ -6463,6 +6468,11 @@ void RenderViewImpl::OnContextMenuClosed(
   }
 }
 
+void RenderViewImpl::OnShowContextMenu() {
+  if (webview())
+    webview()->showContextMenu();
+}
+
 void RenderViewImpl::OnEnableViewSourceMode() {
   if (!webview())
     return;