MacKeyboard: Don't generate keypress for non-printable char

third_party/WebKit/Source/web/WebInputEventConversion.cpp

Index: third_party/WebKit/Source/web/WebInputEventConversion.cpp
diff --git a/third_party/WebKit/Source/web/WebInputEventConversion.cpp b/third_party/WebKit/Source/web/WebInputEventConversion.cpp
index 9621085f36415da1ac97783a5ec242fbe590ffdb..44851cc0745ce1d59b53bad9ef99ebbff56148bd 100644
--- a/third_party/WebKit/Source/web/WebInputEventConversion.cpp
+++ b/third_party/WebKit/Source/web/WebInputEventConversion.cpp
@@ -328,12 +328,18 @@ void PlatformKeyboardEventBuilder::setKeyType(Type type)
 // which don't have associated character events.
 bool PlatformKeyboardEventBuilder::isCharacterKey() const
 {
-    switch (windowsVirtualKeyCode()) {
-    case VKEY_BACK:
-    case VKEY_ESCAPE:
+    if (text().length() == 0)
         return false;
+
+    UChar32 c = text().characterStartingAt(0);
+    switch (c) {
+    case 0x08: // Backspace
+    case 0x1B: // Escape
+    case 0x7F: // Delete
+        return false;
+    default:
+        return true;
     }
-    return true;
 }
 
 inline PlatformEvent::Type toPlatformTouchEventType(const WebInputEvent::Type type)