Make the dismiss button on the CF infobar be an image button.

chrome_frame/turndown_prompt/turndown_prompt_window.h

Index: chrome_frame/turndown_prompt/turndown_prompt_window.h
diff --git a/chrome_frame/turndown_prompt/turndown_prompt_window.h b/chrome_frame/turndown_prompt/turndown_prompt_window.h
index 626fca61f58f8a531d43befa629cd2969ba37dc9..342e38a7ff8779474481aee6c15e0623f437f9bb 100644
--- a/chrome_frame/turndown_prompt/turndown_prompt_window.h
+++ b/chrome_frame/turndown_prompt/turndown_prompt_window.h
@@ -28,8 +28,11 @@ class UrlLauncher;
 
 namespace WTL {
 class CHyperLink;
+class CBitmapButton;
 }  // namespace WTL
 
+class CFBitmapButton;
+
 // Implements a dialog with text and buttons notifying the user that Chrome
 // Frame is being turned down, offering them a link to learn more about moving
 // to a modern browser.
@@ -68,8 +71,8 @@ class TurndownPromptWindow
   BEGIN_DLGRESIZE_MAP(InfobarWindow)
     DLGRESIZE_CONTROL(IDDISMISS, DLSZ_CENTER_Y | DLSZ_MOVE_X)
     DLGRESIZE_CONTROL(IDUNINSTALL, DLSZ_CENTER_Y | DLSZ_MOVE_X)
-    DLGRESIZE_CONTROL(IDC_TD_PROMPT_MESSAGE, DLSZ_SIZE_Y | DLSZ_SIZE_X)
     DLGRESIZE_CONTROL(IDC_TD_PROMPT_LINK, DLSZ_CENTER_Y | DLSZ_MOVE_X)
+    DLGRESIZE_CONTROL(IDC_TD_PROMPT_MESSAGE, DLSZ_SIZE_Y | DLSZ_SIZE_X)
   END_DLGRESIZE_MAP()
 
   virtual void OnFinalMessage(HWND);
@@ -83,6 +86,9 @@ class TurndownPromptWindow
   // The TurndownPromptWindow manages its own destruction.
   virtual ~TurndownPromptWindow();
 
+  // Performs the necessary configuration to initialize a bitmap button.
+  static void SetupBitmapButton(TurndownPromptWindow* window);
+
   // Event handlers.
   void OnDestroy();
   BOOL OnInitDialog(CWindow wndFocus, LPARAM lInitParam);
@@ -101,6 +107,7 @@ class TurndownPromptWindow
 
   InfobarContent::Frame* frame_;  // Not owned by this instance
   scoped_ptr<WTL::CHyperLink> link_;
+  scoped_ptr<CFBitmapButton> close_button_;
   scoped_ptr<UrlLauncher> url_launcher_;
   base::Closure uninstall_closure_;