Support isKeyPad modifier flag in Chrome OS and Linux.

content/browser/renderer_host/input/web_input_event_util.cc

Index: content/browser/renderer_host/input/web_input_event_util.cc
diff --git a/content/browser/renderer_host/input/web_input_event_util.cc b/content/browser/renderer_host/input/web_input_event_util.cc
index bdbec745a52b4083f816a9d3b7aa86cc2c4e844e..ee733149cd93fbe55d171722c4ba588c84d71e0e 100644
--- a/content/browser/renderer_host/input/web_input_event_util.cc
+++ b/content/browser/renderer_host/input/web_input_event_util.cc
@@ -400,6 +400,8 @@ int EventFlagsToWebEventModifiers(int flags) {
     modifiers |= blink::WebInputEvent::CapsLockOn;
   if (flags & ui::EF_IS_REPEAT)
     modifiers |= blink::WebInputEvent::IsAutoRepeat;
+  if (flags & ui::EF_NUMPAD_KEY)
+    modifiers |= blink::WebInputEvent::IsKeyPad;
 
   return modifiers;
 }
@@ -426,6 +428,8 @@ int WebEventModifiersToEventFlags(int modifiers) {
     flags |= ui::EF_CAPS_LOCK_DOWN;
   if (modifiers & blink::WebInputEvent::IsAutoRepeat)
     flags |= ui::EF_IS_REPEAT;
+  if (modifiers & blink::WebInputEvent::IsKeyPad)
+    flags |= ui::EF_NUMPAD_KEY;
 
   return flags;
 }