[KeyEvent Mac] Move WebInputEventFactory into chromium.

ui/events/keycodes/keyboard_code_conversion_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ui/events/keycodes/keyboard_code_conversion_mac.h"
 
 #include <algorithm>
 
 #import <Carbon/Carbon.h>
 
@@ skipping 182 matching lines @@
   { VKEY_CRSEL /* 0xF7 */, -1, 0 },
   { VKEY_EXSEL /* 0xF8 */, -1, 0 },
   { VKEY_EREOF /* 0xF9 */, -1, 0 },
   { VKEY_PLAY /* 0xFA */, -1, 0 },
   { VKEY_ZOOM /* 0xFB */, -1, 0 },
   { VKEY_NONAME /* 0xFC */, -1, 0 },
   { VKEY_PA1 /* 0xFD */, -1, 0 },
   { VKEY_OEM_CLEAR /* 0xFE */, kVK_ANSI_KeypadClear, kClearCharCode }
 };
 
+bool IsKeypadEvent(NSEvent* event) {
+  // Check that this is the type of event that has a keyCode.
+  switch ([event type]) {
+    case NSKeyDown:
+    case NSKeyUp:
+    case NSFlagsChanged:
+      break;
+    default:
+      return false;
+  }
+
+  switch ([event keyCode]) {
+    case kVK_ANSI_KeypadClear:
+    case kVK_ANSI_KeypadEquals:
+    case kVK_ANSI_KeypadMultiply:
+    case kVK_ANSI_KeypadDivide:
+    case kVK_ANSI_KeypadMinus:
+    case kVK_ANSI_KeypadPlus:
+    case kVK_ANSI_KeypadEnter:
+    case kVK_ANSI_KeypadDecimal:
+    case kVK_ANSI_Keypad0:
+    case kVK_ANSI_Keypad1:
+    case kVK_ANSI_Keypad2:
+    case kVK_ANSI_Keypad3:
+    case kVK_ANSI_Keypad4:
+    case kVK_ANSI_Keypad5:
+    case kVK_ANSI_Keypad6:
+    case kVK_ANSI_Keypad7:
+    case kVK_ANSI_Keypad8:
+    case kVK_ANSI_Keypad9:
+      return true;
+  }
+
+  return false;
+}
+
 // A convenient array for getting symbol characters on the number keys.
 const char kShiftCharsForNumberKeys[] = ")!@#$%^&*(";
 
 // Translates from character code to keyboard code.
 KeyboardCode KeyboardCodeFromCharCode(unichar charCode) {
   switch (charCode) {
     case 8: case 0x7F: return VKEY_BACK;
     case 9: return VKEY_TAB;
     case 0xD: case 3: return VKEY_RETURN;
     case 0x1B: return VKEY_ESCAPE;
@@ skipping 313 matching lines @@
     }
   }
 
   // TODO(suzhe): Support characters for Option key bindings.
   return macKeycode;
 }
 
 KeyboardCode KeyboardCodeFromNSEvent(NSEvent* event) {
   KeyboardCode code = VKEY_UNKNOWN;
 
-  if ([event type] == NSKeyDown || [event type] == NSKeyUp) {
+  if (!IsKeypadEvent(event) &&
+      ([event type] == NSKeyDown || [event type] == NSKeyUp)) {
     NSString* characters = [event characters];
     if ([characters length] > 0)
       code = KeyboardCodeFromCharCode([characters characterAtIndex:0]);
     if (code)
       return code;
 
     characters = [event charactersIgnoringModifiers];
     if ([characters length] > 0)
       code = KeyboardCodeFromCharCode([characters characterAtIndex:0]);
     if (code)
       return code;
   }
   return KeyboardCodeFromKeyCode([event keyCode]);
 }
 
 DomCode CodeFromNSEvent(NSEvent* event) {
   return ui::KeycodeConverter::NativeKeycodeToDomCode([event keyCode]);
 }
 
 }  // namespace ui