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 547a598111bd370a9c6dd27add8f1f0def382a93..a83ffbe51593913e66942a28e750fcb9147e242e 100644
--- a/third_party/WebKit/Source/web/WebInputEventConversion.cpp
+++ b/third_party/WebKit/Source/web/WebInputEventConversion.cpp
@@ -328,17 +328,20 @@ void PlatformKeyboardEventBuilder::setKeyType(Type type)
     }
 }
 
-// Please refer to bug http://b/issue?id=961192, which talks about Webkit
-// keyboard event handling changes. It also mentions the list of keys
-// 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)