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 3df8edb12fb483d5ba4ad4ef7a8c350a20cee49d..f92713d0e9bde94206547fc146633cf58f8d4e04 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2055,6 +2055,16 @@ void WebContentsImpl::SelectRange(const gfx::Point& base,
       new InputMsg_SelectRange(focused_frame->GetRoutingID(), base, extent));
 }
 
+void WebContentsImpl::ExpandSelectionByCharacterOffset(int start_adjust,
+                                                       int end_adjust) {
+  RenderFrameHost* focused_frame = GetFocusedFrame();
+  if (!focused_frame)
+    return;
+
+  focused_frame->Send(new InputMsg_ExpandSelectionByCharacterOffset(
+      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;