Removed Form Resubmission callback from CRWWebDelegate.

ios/web/web_state/web_state_delegate_bridge.mm

Index: ios/web/web_state/web_state_delegate_bridge.mm
diff --git a/ios/web/web_state/web_state_delegate_bridge.mm b/ios/web/web_state/web_state_delegate_bridge.mm
index 695410ae94365af1561fc7adb3db7463ac7e930c..1b80609d9dbd2501bfa6def4d5c396f0e0330f20 100644
--- a/ios/web/web_state/web_state_delegate_bridge.mm
+++ b/ios/web/web_state/web_state_delegate_bridge.mm
@@ -37,6 +37,21 @@ bool WebStateDelegateBridge::HandleContextMenu(
   return NO;
 }
 
+void WebStateDelegateBridge::ShowRepostFormWarningDialog(
+    WebState* source,
+    const base::Callback<void(bool)>& callback) {
+  base::Callback<void(bool)> local_callback(callback);
+  SEL selector = @selector(webState:runRepostFormDialogWithCompletionHandler:);
+  if ([delegate_ respondsToSelector:selector]) {
+    [delegate_ webState:source
+        runRepostFormDialogWithCompletionHandler:^(BOOL should_continue) {

[rohitrao (ping after 24h), 2017/01/24 14:15:13]

This is a block that runs a callback that runs a block that runs a block? =)  I
don't have any better suggestions, it just seems unfortunate.

[Eugene But (OOO till 7-30), 2017/01/24 21:33:11]

Well... Objective-C and C++ callback patterns are different. There should be an
ugly place where C++ API is adapted for Objective-C language.

+          local_callback.Run(should_continue);
+        }];
+  } else {
+    local_callback.Run(true);
+  }
+}
+
 JavaScriptDialogPresenter* WebStateDelegateBridge::GetJavaScriptDialogPresenter(
     WebState* source) {
   SEL selector = @selector(javaScriptDialogPresenterForWebState:);