Adds selection expansion support for Contextual Search.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 4bc516b57e9bc0df47a7a9f05fb104d0a93cdeee..e33d53003e3e5e1d21d94e005bcd539268b9b68f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2056,6 +2056,16 @@ void WebContentsImpl::SelectRange(const gfx::Point& base,
       new InputMsg_SelectRange(focused_frame->GetRoutingID(), base, extent));
 }
 
+void WebContentsImpl::AdjustSelectionByCharacterOffset(int start_adjust,
+                                                       int end_adjust) {
+  RenderFrameHost* focused_frame = GetFocusedFrame();
+  if (!focused_frame)
+    return;
+
+  focused_frame->Send(new InputMsg_AdjustSelectionByCharacterOffset(
+      focused_frame->GetRoutingID(), start_adjust, end_adjust));
+}
+
 void WebContentsImpl::UpdatePreferredSize(const gfx::Size& pref_size) {
   const gfx::Size old_size = GetPreferredSize();
   preferred_size_ = pref_size;