Prevent querying of restricted query values.

chrome/renderer/searchbox/searchbox.cc

 // Copyright 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 "chrome/renderer/searchbox/searchbox.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/renderer/searchbox/searchbox_extension.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityPolicy.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
 SearchBox::SearchBox(content::RenderView* render_view)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<SearchBox>(render_view),
       verbatim_(false),
       selection_start_(0),
       selection_end_(0),
       results_base_(0),
       start_margin_(0),
       last_results_base_(0),
       is_key_capture_enabled_(false),
       display_instant_results_(false),
-      omnibox_font_size_(0) {
+      omnibox_font_size_(0),
+      last_restricted_id_(0) {
 }
 
 SearchBox::~SearchBox() {
 }
 
 void SearchBox::SetSuggestions(
     const std::vector<InstantSuggestion>& suggestions) {
   if (!suggestions.empty() &&
       suggestions[0].behavior == INSTANT_COMPLETE_REPLACE) {
     query_ = suggestions[0].text;
     verbatim_ = true;
     selection_start_ = selection_end_ = query_.size();
   }
   // Explicitly allow empty vector to be sent to the browser.
   render_view()->Send(new ChromeViewHostMsg_SetSuggestions(
       render_view()->GetRoutingID(), render_view()->GetPageId(), suggestions));
 }
 
+void SearchBox::ClearQuery() {
+  query_.clear();
+}
+
 void SearchBox::ShowInstantOverlay(InstantShownReason reason,
                                    int height,
                                    InstantSizeUnits units) {
   render_view()->Send(new ChromeViewHostMsg_ShowInstantOverlay(
       render_view()->GetRoutingID(), render_view()->GetPageId(), reason,
       height, units));
 }
 
 void SearchBox::FocusOmnibox() {
   render_view()->Send(new ChromeViewHostMsg_FocusOmnibox(
@@ skipping 291 matching lines @@
   if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
     extensions_v8::SearchBoxExtension::DispatchMostVisitedChanged(
         render_view()->GetWebView()->mainFrame());
   }
 }
 
 const std::vector<InstantMostVisitedItem>&
 SearchBox::GetMostVisitedItems() const {
   return most_visited_items_;
 }