add "always allow" option to the mediastream infobar and allow user to allow/not allow acces to devi

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 9cc0a79944806e2daa6dd7185fed86358a6b6f59..f30884eb2f63612b1b1f3b40aa8f7e58adda390d 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -1125,13 +1125,17 @@ void ChromeContentBrowserClient::RequestMediaAccessPermission(
         infobar_helper->GetInfoBarDelegateAt(i)->AsMediaStreamInfoBarDelegate();
   }
 
-  InfoBarDelegate* infobar = new MediaStreamInfoBarDelegate(infobar_helper,
-                                                            request,
-                                                            callback);
-  if (old_infobar)
-    infobar_helper->ReplaceInfoBar(old_infobar, infobar);
-  else
-    infobar_helper->AddInfoBar(infobar);
+  scoped_ptr<MediaStreamInfoBarDelegate>
+      infobar(new MediaStreamInfoBarDelegate(infobar_helper,
+                                             tab->profile(),
+                                             request,
+                                             callback));
+  if (infobar->ShouldShowInfoBar()) {
+    if (old_infobar)
+      infobar_helper->ReplaceInfoBar(old_infobar, infobar.release());
+    else
+      infobar_helper->AddInfoBar(infobar.release());
+  }
 }
 
 content::MediaObserver* ChromeContentBrowserClient::GetMediaObserver() {