MacViews: Use native SadTabView in mac_views_browser.

chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm

Index: chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm b/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm
index 1fb3213cbbc9fbc63ffd96c53ba081f5a66845cb..747dfe23d8d0c9698334b120141cab037e39c88b 100644
--- a/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.mm
@@ -6,8 +6,12 @@
 
 #include "base/mac/bundle_locations.h"
 #import "chrome/browser/ui/cocoa/tab_contents/sad_tab_view_cocoa.h"
+#include "chrome/common/url_constants.h"
 #include "content/public/browser/web_contents.h"
 
+using content::OpenURLParams;
+using content::Referrer;
+
 namespace chrome {
 
 SadTab* SadTab::Create(content::WebContents* web_contents, SadTabKind kind) {
@@ -71,4 +75,10 @@ void SadTabCocoa::Close() {
   webContents_->GetController().Reload(true);
 }
 
+- (void)openLearnMoreAboutCrashLink:(id)sender {
+  OpenURLParams params(GURL(chrome::kCrashReasonURL), Referrer(), CURRENT_TAB,
+                       ui::PAGE_TRANSITION_LINK, false);
+  webContents_->OpenURL(params);
+}
+
 @end