Adds selection expansion support for Contextual Search.

content/public/browser/render_view_host.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_
 
 #include "base/callback_forward.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_widget_host.h"
@@ skipping 34 matching lines @@
 // like loading pages, adjusting the display and other browser functionality,
 // which it translates into IPC messages sent over the IPC channel with the
 // RenderView. It responds to all IPC messages sent by that RenderView and
 // cracks them, calling a delegate object back with higher level types where
 // possible.
 //
 // The intent of this interface is to provide a view-agnostic communication
 // conduit with a renderer. This is so we can build HTML views not only as
 // WebContents (see WebContents for an example) but also as views, etc.
 //
 // DEPRECATED: RenderViewHost is being removed as part of the SiteIsolation

[Charlie Reis, 2015/07/06 21:30:40]

This class is deprecated because it doesn't support out-of-process iframes.  Is
there a way to move this code to RenderFrameHost?  Should all the selection code
be moved there to support out-of-process iframes?

 // project. New code should not be added here, but to either RenderFrameHost
 // (if frame specific) or WebContents (if page specific).
 //
 // For context, please see https://crbug.com/467770 and
 // http://www.chromium.org/developers/design-documents/site-isolation.
 class CONTENT_EXPORT RenderViewHost : virtual public RenderWidgetHost {
  public:
   // Returns the RenderViewHost given its ID and the ID of its render process.
   // Returns nullptr if the IDs do not correspond to a live RenderViewHost.
   static RenderViewHost* FromID(int render_process_id, int render_view_id);
@@ skipping 124 matching lines @@
   // If any state that affects the webkit preferences changed, this method must
   // be called. This triggers recomputing preferences.
   virtual void OnWebkitPreferencesChanged() = 0;
 
   // Passes a list of Webkit preferences to the renderer.
   virtual void UpdateWebkitPreferences(const WebPreferences& prefs) = 0;
 
   // Notify the render view host to select the word around the caret.
   virtual void SelectWordAroundCaret() = 0;
 
+  // Notify the render view host to adjust the expand selection by the given
+  // amounts.
+  virtual void ExpandSelectionByCharacterOffset(int start_adjust,
+                                                int end_adjust) = 0;

[Charlie Reis, 2015/07/06 21:30:41]

Is it possible for this to cross a frame boundary?  If so, what happens if the
frame lives in a different process?

+
 #if defined(OS_ANDROID)
   // Selects and zooms to the find result nearest to the point (x,y)
   // defined in find-in-page coordinates.
   virtual void ActivateNearestFindResult(int request_id, float x, float y) = 0;
 
   // Asks the renderer to send the rects of the current find matches.
   virtual void RequestFindMatchRects(int current_version) = 0;
 #endif
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderViewHostImpl;
   RenderViewHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_VIEW_HOST_H_