Add chrome frame tests for common navigation cases to ensure IE is not broken.

chrome_frame/test/simulate_input.h

Index: chrome_frame/test/simulate_input.h
diff --git a/chrome_frame/test/simulate_input.h b/chrome_frame/test/simulate_input.h
index 135c310a7f4e293c414fa0506da22428f261ab88..fab22a81b0c0f5b7ef4a3105e17cd5e9abba298a 100644
--- a/chrome_frame/test/simulate_input.h
+++ b/chrome_frame/test/simulate_input.h
@@ -37,8 +37,11 @@ void SetKeyboardFocusToWindow(HWND window);
 void SendMnemonic(WORD mnemonic_char, Modifier modifiers, bool extended,
                   bool unicode);
 
-// Sends a mouse click to the window passed in.
+// Sends a mouse click to the desktop.
 enum MouseButton { LEFT, RIGHT, MIDDLE, X };
+void SendMouseClick(int x, int y, MouseButton button);
+// Sends a mouse click to the window passed in, after ensuring that the window
+// is in the foreground.
 void SendMouseClick(HWND window, int x, int y, MouseButton button);
 
 // Translates a single char to a virtual key.