Move filtering logic in GetDataListSuggestions() to Blink.

third_party/WebKit/Source/web/WebInputElement.cpp

Index: third_party/WebKit/Source/web/WebInputElement.cpp
diff --git a/third_party/WebKit/Source/web/WebInputElement.cpp b/third_party/WebKit/Source/web/WebInputElement.cpp
index e8b4233335d845035dcc235a4a6b04be14f6b5e9..c116144aac83e38e3d7f2120ee68442af9a6e4ad 100644
--- a/third_party/WebKit/Source/web/WebInputElement.cpp
+++ b/third_party/WebKit/Source/web/WebInputElement.cpp
@@ -42,6 +42,7 @@
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebString.h"
 #include "public/web/WebElementCollection.h"
+#include "public/web/WebOptionElement.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
@@ -122,11 +123,33 @@ bool WebInputElement::isMultiple() const
     return constUnwrap<HTMLInputElement>()->multiple();
 }
 
-WebElementCollection WebInputElement::dataListOptions() const
-{
-    if (HTMLDataListElement* dataList = toHTMLDataListElement(constUnwrap<HTMLInputElement>()->list()))
-        return WebElementCollection(dataList->options());
-    return WebElementCollection();
+WebVector<WebOptionElement> WebInputElement::filteredDataListOptions() const
+{
+    const HTMLInputElement* input = constUnwrap<HTMLInputElement>();
+    Vector<WebOptionElement> filtered;
+    HTMLDataListElement* dataList = input->dataList();
+    if (!dataList)
+        return filtered;
+
+    String prefix = input->innerEditorValue();
+    if (input->multiple() && input->type() == InputTypeNames::email) {
+        Vector<String> emails;
+        prefix.split(',', true, emails);
+        if (!emails.isEmpty())
+            prefix = emails.last().stripWhiteSpace();
+    }
+
+    HTMLDataListOptionsCollection* options = dataList->options();
+    filtered.reserveCapacity(options->length());
+    prefix = prefix.lower();
+    for (unsigned i = 0; i < options->length(); ++i) {
+        HTMLOptionElement* option = options->item(i);
+        DCHECK(option);
+        if (!option->value().lower().startsWith(prefix) || !input->isValidValue(option->value()))
+            continue;
+        filtered.append(WebOptionElement(option));
+    }
+    return filtered;
 }
 
 WebString WebInputElement::localizeValue(const WebString& proposedValue) const