Address EventRewriter Warning

chrome/browser/chromeos/events/event_rewriter.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/chromeos/events/event_rewriter.h"
 
 #include <vector>
 
 #include "ash/sticky_keys/sticky_keys_controller.h"
 #include "ash/wm/window_state.h"
@@ skipping 937 matching lines @@
   XIDeviceInfo* device_info =
       XIQueryDevice(gfx::GetXDisplay(), device_id, &ndevices_return);
 
   // Since |device_id| is neither XIAllDevices nor XIAllMasterDevices,
   // the number of devices found should be either 0 (not found) or 1.
   if (!device_info) {
     LOG(ERROR) << "XIQueryDevice: Device ID " << device_id << " is unknown.";
     return kDeviceUnknown;
   }
 
-  DeviceType dev_type;
+  DeviceType dev_type = kDeviceUnknown;
   DCHECK_EQ(1, ndevices_return);
   for (int i = 0; i < ndevices_return; ++i) {
     // Get keyboard product and vendor id.
     int vendor_id = kUnknownVendorId;
     int product_id = kUnknownProductId;
     uint32* product_info = NULL;
     Atom type;
     int format_return;
     unsigned long num_items_return;
     unsigned long bytes_after_return;
@@ skipping 27 matching lines @@
   // TODO(spang): Figure out where we can get keyboard vendor/product id from in
   // Ozone/Freon version.
   return KeyboardDeviceAddedInternal(device_id,
                                      "keyboard",
                                      kUnknownVendorId,
                                      kUnknownProductId);
 #endif
 }
 
 }  // namespace chromeos