Fix the handling of user gestures for external protocol handler dialogs.

chrome/browser/external_protocol/external_protocol_handler.cc

Index: chrome/browser/external_protocol/external_protocol_handler.cc
diff --git a/chrome/browser/external_protocol/external_protocol_handler.cc b/chrome/browser/external_protocol/external_protocol_handler.cc
index b414261cb32dd576f655e6e8529eba46d817e917..fa8f967a66c1d047ee60179a4ce1271ae4a65901 100644
--- a/chrome/browser/external_protocol/external_protocol_handler.cc
+++ b/chrome/browser/external_protocol/external_protocol_handler.cc
@@ -27,11 +27,6 @@
 
 using content::BrowserThread;
 
-// Whether we accept requests for launching external protocols. This is set to
-// false every time an external protocol is requested, and set back to true on
-// each user gesture. This variable should only be accessed from the UI thread.
-static bool g_accept_requests = true;
-
 namespace {
 
 // Functions enabling unit testing. Using a NULL delegate will use the default
@@ -49,11 +44,12 @@ ShellIntegration::DefaultProtocolClientWorker* CreateShellWorker(
 
 ExternalProtocolHandler::BlockState GetBlockStateWithDelegate(
     const std::string& scheme,
-    ExternalProtocolHandler::Delegate* delegate) {
+    ExternalProtocolHandler::Delegate* delegate,
+    bool user_gesture) {
   if (!delegate)
-    return ExternalProtocolHandler::GetBlockState(scheme);
+    return ExternalProtocolHandler::GetBlockState(scheme, user_gesture);
 
-  return delegate->GetBlockState(scheme);
+  return delegate->GetBlockState(scheme, user_gesture);
 }
 
 void RunExternalProtocolDialogWithDelegate(
@@ -203,9 +199,10 @@ void ExternalProtocolHandler::PrepopulateDictionary(
 
 // static
 ExternalProtocolHandler::BlockState ExternalProtocolHandler::GetBlockState(
-    const std::string& scheme) {
-  // If we are being carpet bombed, block the request.
-  if (!g_accept_requests)
+    const std::string& scheme,
+    bool user_gesture) {
+
+  if (!user_gesture)
     return BLOCK;
 
   if (scheme.length() == 1) {
@@ -255,7 +252,8 @@ void ExternalProtocolHandler::SetBlockState(const std::string& scheme,
 void ExternalProtocolHandler::LaunchUrlWithDelegate(const GURL& url,
                                                     int render_process_host_id,
                                                     int tab_contents_id,
-                                                    Delegate* delegate) {
+                                                    Delegate* delegate,
+                                                    bool user_gesture) {
   DCHECK(base::MessageLoopForUI::IsCurrent());
 
   // Escape the input scheme to be sure that the command does not
@@ -263,15 +261,14 @@ void ExternalProtocolHandler::LaunchUrlWithDelegate(const GURL& url,
   std::string escaped_url_string = net::EscapeExternalHandlerValue(url.spec());
   GURL escaped_url(escaped_url_string);
   BlockState block_state = GetBlockStateWithDelegate(escaped_url.scheme(),
-                                                     delegate);
+                                                     delegate,
+                                                     user_gesture);
   if (block_state == BLOCK) {
     if (delegate)
       delegate->BlockRequest();
     return;
   }
 
-  g_accept_requests = false;
-
   // The worker creates tasks with references to itself and puts them into
   // message loops. When no tasks are left it will delete the observer and
   // eventually be deleted itself.
@@ -308,9 +305,3 @@ void ExternalProtocolHandler::LaunchUrlWithoutSecurityCheck(
 void ExternalProtocolHandler::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterDictionaryPref(prefs::kExcludedSchemes);
 }
-
-// static
-void ExternalProtocolHandler::PermitLaunchUrl() {
-  DCHECK(base::MessageLoopForUI::IsCurrent());
-  g_accept_requests = true;
-}