Implement virtual keyboard hiding.

chrome/browser/extensions/api/input/input.h

Index: chrome/browser/extensions/api/input/input.h
diff --git a/chrome/browser/extensions/api/input/input.h b/chrome/browser/extensions/api/input/input.h
index 703c34ca8d0c733668e3d30b8f205a5d71dc72fd..c0d516c227690916f65f7da7e87025c6a9f45ca9 100644
--- a/chrome/browser/extensions/api/input/input.h
+++ b/chrome/browser/extensions/api/input/input.h
@@ -50,6 +50,19 @@ class SendKeyEventFunction : public SyncExtensionFunction {
   virtual bool RunImpl() OVERRIDE;
 };
 
+class HideKeyboardFunction : public SyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION(
+      "virtualKeyboardPrivate.hideKeyboard",
+      VIRTUALKEYBOARDPRIVATE_HIDEKEYBOARD);
+
+ protected:
+  virtual ~HideKeyboardFunction() {}
+
+  // ExtensionFunction:
+  virtual bool RunImpl() OVERRIDE;
+};
+
 class InputAPI : public ProfileKeyedAPI {
  public:
   explicit InputAPI(Profile* profile);