Add hideKeyboard API to chrome.experimental.input.

chrome/browser/extensions/extension_input_api.h

Index: chrome/browser/extensions/extension_input_api.h
diff --git a/chrome/browser/extensions/extension_input_api.h b/chrome/browser/extensions/extension_input_api.h
index 2bf7f8f524c45a3da59aae9a0ca8bc916f59df1a..b2f80e4894a12ad8c7c158f388904d7ddd8f33bd 100644
--- a/chrome/browser/extensions/extension_input_api.h
+++ b/chrome/browser/extensions/extension_input_api.h
@@ -33,6 +33,14 @@ class SendKeyboardEventInputFunction : public InputFunction {
   views::Widget* GetTopLevelWidget();
 };
 
+#if defined(TOUCH_UI)
+class HideKeyboardFunction : public AsyncExtensionFunction {
+ public:
+  virtual bool RunImpl();
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.input.hideKeyboard");
+};
+#endif
+
 #if defined(OS_CHROMEOS) && defined(TOUCH_UI)
 // Note that this experimental APIs are currently only available for
 // TOUCH_UI version of Chrome OS. Please also note that the version of Chrome