Adds selection expansion support for Contextual Search.

content/browser/web_contents/web_contents_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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 2037 matching lines @@
 void WebContentsImpl::SelectRange(const gfx::Point& base,
                                   const gfx::Point& extent) {
   RenderFrameHost* focused_frame = GetFocusedFrame();
   if (!focused_frame)
     return;
 
   focused_frame->Send(
       new InputMsg_SelectRange(focused_frame->GetRoutingID(), base, extent));
 }
 
+void WebContentsImpl::ExpandSelectionByCharacterOffset(int start_adjust,
+                                                       int end_adjust) {
+  RenderFrameHost* focused_frame = GetFocusedFrame();

[Charlie Reis, 2015/07/07 17:02:27]

Yes, operating on the focused frame sounds right to me.

+  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;
   OnPreferredSizeChanged(old_size);
 }
 
 void WebContentsImpl::ResizeDueToAutoResize(const gfx::Size& new_size) {
   if (delegate_)
     delegate_->ResizeDueToAutoResize(this, new_size);
 }
@@ skipping 2408 matching lines @@
   player_map->erase(it);
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content