IndexedDB: Add histograms for key type

third_party/WebKit/Source/web/WebIDBKey.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 121 matching lines @@
         break;
       case IDBKey::DateType:
         keys[i] = WebIDBKey::createDate(key->date());
         break;
       case IDBKey::NumberType:
         keys[i] = WebIDBKey::createNumber(key->number());
         break;
       case IDBKey::InvalidType:
         keys[i] = WebIDBKey::createInvalid();
         break;
-      case IDBKey::MinType:
-        NOTREACHED();
-        break;
     }
   }
   result.swap(keys);
 }
 
 void WebIDBKey::assignArray(const WebVector<WebIDBKey>& array) {
   m_private = convertFromWebIDBKeyArray(array);
 }
 
 void WebIDBKey::assignBinary(const WebData& binary) {
@@ skipping 48 matching lines @@
 
 double WebIDBKey::date() const {
   return m_private->date();
 }
 
 double WebIDBKey::number() const {
   return m_private->number();
 }
 
 }  // namespace blink