Iterate over multiple forms.

ios/chrome/browser/autofill/autofill_agent.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/autofill/autofill_agent.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 47 matching lines @@
 typedef void (^FetchFormsCompletionHandler)(BOOL, const FormDataVector&);
 
 // Gets the first form and field specified by |fieldName| from |forms|,
 // modifying the returned field so that input elements are also handled.
 void GetFormAndField(autofill::FormData* form,
                      autofill::FormFieldData* field,
                      const FormDataVector& forms,
                      const std::string& fieldName,
                      const std::string& type) {
   DCHECK_GE(forms.size(), 1U);
-  *form = forms[0];
   const base::string16 fieldName16 = base::UTF8ToUTF16(fieldName);
-  for (const auto& currentField : form->fields) {
-    if (currentField.name == fieldName16) {
-      *field = currentField;
-      break;
+  for (const auto& currentForm : forms) {
+    for (const auto& currentField : currentForm.fields) {
+      if (currentField.name == fieldName16) {
+        *form = currentForm;
+        *field = currentField;
+        break;
+      }
     }
   }
   if (field->SameFieldAs(autofill::FormFieldData()))
     return;
 
   // Hack to get suggestions from select input elements.
   if (field->form_control_type == "select-one") {
     // Any value set will cause the AutofillManager to filter suggestions (only
     // show suggestions that begin the same as the current value) with the
     // effect that one only suggestion would be returned; the value itself.
@@ skipping 447 matching lines @@
   if (trustLevel != web::URLVerificationTrustLevel::kAbsolute) {
     DLOG(WARNING) << "Suggestions not offered on untrusted page";
     completion(NO);
     return;
   }
 
   // Once the active form and field are extracted, send a query to the
   // AutofillManager for suggestions.
   __weak AutofillAgent* weakSelf = self;
   id completionHandler = ^(BOOL success, const FormDataVector& forms) {
-    if (success && forms.size() == 1) {
+    if (success && forms.size() >= 1) {
       [weakSelf queryAutofillWithForms:forms
                                  field:fieldName
                                   type:type
                             typedValue:typedValue
                               webState:webState
                      completionHandler:completion];
     }
   };
 
   // Re-extract the active form and field only. All forms with at least one
@@ skipping 184 matching lines @@
   // if we do it now a flicker will be seen.
   if (type.compare("blur") == 0)
     return;
 
   // Necessary so the strings can be used inside a block.
   std::string fieldNameCopy = fieldName;
   std::string typeCopy = type;
 
   __weak AutofillAgent* weakSelf = self;
   id completionHandler = ^(BOOL success, const FormDataVector& forms) {
-    if (success && forms.size() == 1) {
+    if (success && forms.size() >= 1) {
       [weakSelf processFormActivityExtractedData:forms
                                        fieldName:fieldNameCopy
                                             type:typeCopy
                                         webState:webState];
     }
   };
 
   // Re-extract the active form and field only. There is no minimum field
   // requirement because key/value suggestions are offered event on short forms.
   [self fetchFormsWithName:base::UTF8ToUTF16(formName)
@@ skipping 117 matching lines @@
     }
     predictionData.SetWithoutPathExpansion(base::UTF16ToUTF8(formData.name),
                                            std::move(formJSONData));
   }
   std::string dataString;
   base::JSONWriter::Write(predictionData, &dataString);
   [jsAutofillManager_ fillPredictionData:base::SysUTF8ToNSString(dataString)];
 }
 
 @end