Revert of Remove setVoiceSearchSupported part of EmbeddedSearch SearchBox API.

chrome/browser/ui/search/search_model.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 CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_H_
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
 #include "chrome/common/search_types.h"
 
 class SearchModelObserver;
 
 // Represents whether a page supports Instant.
 enum InstantSupportState {
   INSTANT_SUPPORT_NO,
   INSTANT_SUPPORT_YES,
   INSTANT_SUPPORT_UNKNOWN,
 };
 
 // An observable model for UI components that care about search model state
 // changes.
 class SearchModel {
  public:
   struct State {
     State();
-    State(const SearchMode& mode, InstantSupportState instant_support);
+    State(const SearchMode& mode,
+          InstantSupportState instant_support,
+          bool voice_search_supported);
 
     bool operator==(const State& rhs) const;
 
     // The display mode of UI elements such as the toolbar, the tab strip, etc.
     SearchMode mode;
 
     // Does the current page support Instant?
     InstantSupportState instant_support;
+
+    // Does the current page support voice search?
+    bool voice_search_supported;
   };
 
   SearchModel();
   ~SearchModel();
 
   // Change the state.  Change notifications are sent to observers.
   void SetState(const State& state);
 
   // Get the current state.
   const State& state() const { return state_; }
 
   // Change the mode.  Change notifications are sent to observers.
   void SetMode(const SearchMode& mode);
 
   // Get the active mode.
   const SearchMode& mode() const { return state_.mode; }
 
   // Sets the page instant support state. Change notifications are sent to
   // observers.
   void SetInstantSupportState(InstantSupportState instant_support);
 
   // Gets the instant support state of the page.
   InstantSupportState instant_support() const {
     return state_.instant_support;
   }
 
+  // Sets the page voice search support state.  Change notifications are sent to
+  // observers.
+  void SetVoiceSearchSupported(bool supported);
+
+  // Gets the voice search support state of the page.
+  bool voice_search_supported() const { return state_.voice_search_supported; }
+
   // Add and remove observers.
   void AddObserver(SearchModelObserver* observer);
   void RemoveObserver(SearchModelObserver* observer);
 
  private:
   // Current state of model.
   State state_;
 
   // Observers.
   base::ObserverList<SearchModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchModel);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_H_