Add a CodeToNativeKeycode helper that converts UIEvent code to native code.

content/public/test/browser_test_utils.h

Index: content/public/test/browser_test_utils.h
diff --git a/content/public/test/browser_test_utils.h b/content/public/test/browser_test_utils.h
index 4dce33e2df01ceebc72aab4bc34a01265c7fc7fb..50ff77fc2a38dac1d5e3833bdd14b42628831263 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -79,13 +79,38 @@ void SimulateMouseEvent(WebContents* web_contents,
                         const gfx::Point& point);
 
 // Sends a key press asynchronously.
+// The native code of the key event will be set to InvalidNativeKeycode().
+// |key_code| alone is good enough for scenarios that only need the char
+// value represented by a key event and not the physical key on the keyboard
+// or the keyboard layout.
+// For scenarios such as chromoting that need the native code,
+// SimulateKeyPressWithCode should be used.
 void SimulateKeyPress(WebContents* web_contents,
-                      ui::KeyboardCode key,
+                      ui::KeyboardCode key_code,
                       bool control,
                       bool shift,
                       bool alt,
                       bool command);
 
+// Sends a key press asynchronously.
+// |code| specifies the UIEvents (aka: DOM4Events) value of the key:
+// https://dvcs.w3.org/hg/d4e/raw-file/tip/source_respec.htm
+// The native code of the key event will be set based on |code|.
+// See ui/base/keycodes/vi usb_keycode_map.h for mappings between |code|
+// and the native code.
+// Examples of the various codes:
+//   key_code: VKEY_A
+//   code: "KeyA"
+//   native key code: 0x001e (for Windows).
+//   native key code: 0x0026 (for Linux).
+void SimulateKeyPressWithCode(WebContents* web_contents,
+                              ui::KeyboardCode key_code,
+                              const char* code,
+                              bool control,
+                              bool shift,
+                              bool alt,
+                              bool command);
+
 // Allow ExecuteScript* methods to target either a WebContents or a
 // RenderViewHost.  Targetting a WebContents means executing script in the
 // RenderViewHost returned by WebContents::GetRenderViewHost(), which is the