Plumbing for browser process to access text surrounding selection.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index a62b7f8cd18f1ac9a9a4f9aa57a18f1fad49ce28..2cd8f543d18e73d3a1db58b7396ded505fe40908 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -320,6 +320,8 @@ bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
                         OnShowDesktopNotification)
     IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_Cancel,
                         OnCancelDesktopNotification)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_TextSurroundingSelectionResponse,
+                        OnTextSurroundingSelectionResponse)
   IPC_END_MESSAGE_MAP()
 
   return handled;
@@ -693,6 +695,14 @@ void RenderFrameHostImpl::OnCancelDesktopNotification(int notification_id) {
   cancel_notification_callbacks_.erase(notification_id);
 }
 
+void RenderFrameHostImpl::OnTextSurroundingSelectionResponse(
+    const base::string16& content,
+    unsigned start_offset,
+    unsigned end_offset) {
+  render_view_host_->OnTextSurroundingSelectionResponse(

[nasko, 2014/05/22 18:59:04]

It will be better to avoid forwarding new functionality to RVH, as it will
disappear at some point in the future.
Each RFH will have an associated view, so it will be better to introduce a
GetView() method and for now it will get it from RVH, but in the future will use
its own.

+      content, start_offset, end_offset);
+}
+
 void RenderFrameHostImpl::OnDidAccessInitialDocument() {
   delegate_->DidAccessInitialDocument();
 }