Revert of Remove setVoiceSearchSupported part of EmbeddedSearch SearchBox API.

chrome/browser/ui/cocoa/location_bar/mic_search_decoration.h

Index: chrome/browser/ui/cocoa/location_bar/mic_search_decoration.h
diff --git a/chrome/browser/ui/cocoa/location_bar/mic_search_decoration.h b/chrome/browser/ui/cocoa/location_bar/mic_search_decoration.h
new file mode 100644
index 0000000000000000000000000000000000000000..91c05ccaaea23bef01af88faeb6e0a4b99bf9137
--- /dev/null
+++ b/chrome/browser/ui/cocoa/location_bar/mic_search_decoration.h
@@ -0,0 +1,32 @@
+// Copyright 2013 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_COCOA_LOCATION_BAR_MIC_SEARCH_DECORATION_H_
+#define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_MIC_SEARCH_DECORATION_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "chrome/browser/ui/cocoa/location_bar/image_decoration.h"
+
+class CommandUpdater;
+
+// Draws a microphone icon on the right side of the omnibox. This is used for
+// voice search.
+class MicSearchDecoration : public ImageDecoration {
+ public:
+  explicit MicSearchDecoration(CommandUpdater* command_updater);
+  ~MicSearchDecoration() override;
+
+  // Implement |LocationBarDecoration|.
+  bool AcceptsMousePress() override;
+  bool OnMousePressed(NSRect frame, NSPoint location) override;
+  NSString* GetToolTip() override;
+
+ private:
+  CommandUpdater* command_updater_;  // Weak, owned by Browser.
+
+  DISALLOW_COPY_AND_ASSIGN(MicSearchDecoration);
+};
+
+#endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_MIC_SEARCH_DECORATION_H_