Mouse press should focus on any types of form controls.

Source/core/html/HTMLButtonElement.cpp

Index: Source/core/html/HTMLButtonElement.cpp
diff --git a/Source/core/html/HTMLButtonElement.cpp b/Source/core/html/HTMLButtonElement.cpp
index 855af6438c4991db8b5910ca96126744a58eec95..cc581d2bf6fe27f46fde664b52f20817b9bb6c49 100644
--- a/Source/core/html/HTMLButtonElement.cpp
+++ b/Source/core/html/HTMLButtonElement.cpp
@@ -125,10 +125,13 @@ void HTMLButtonElement::defaultEventHandler(Event* event)
     }
 
     if (event->isKeyboardEvent()) {
-        if (event->type() == eventNames().keydownEvent && static_cast<KeyboardEvent*>(event)->keyIdentifier() == "U+0020") {
-            setActive(true, true);
-            // No setDefaultHandled() - IE dispatches a keypress in this case.
-            return;
+        if (event->type() == eventNames().keydownEvent) {
+            willHandleKeyDownEvent();
+            if (static_cast<KeyboardEvent*>(event)->keyIdentifier() == "U+0020") {
+                setActive(true, true);
+                // No setDefaultHandled() - IE dispatches a keypress in this case.
+                return;
+            }
         }
         if (event->type() == eventNames().keypressEvent) {
             switch (static_cast<KeyboardEvent*>(event)->charCode()) {