[Gamepad API] Fix gamepad crash that happens when a gamepad is disconnected

device/gamepad/gamepad_provider.cc

 // 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.
 
 #include "device/gamepad/gamepad_provider.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <cmath>
 #include <utility>
@@ skipping 235 matching lines @@
 
   blink::WebGamepads* buffer = gamepad_shared_buffer_->buffer();
 
   // Send out disconnect events using the last polled data before we wipe it out
   // in the mapping step.
   if (ever_had_user_gesture_) {
     for (unsigned i = 0; i < WebGamepads::itemsLengthCap; ++i) {
       PadState& state = pad_states_.get()[i];
 
       if (!state.active_state && state.source != GAMEPAD_SOURCE_NONE) {
-        OnGamepadConnectionChange(false, i, buffer->items[i]);
+        blink::WebGamepad& pad = buffer->items[i];
+        pad.connected = false;
+        OnGamepadConnectionChange(false, i, pad);
         ClearPadState(state);
       }
     }
   }
 
   {
     base::AutoLock lock(shared_memory_lock_);
 
     // Acquire the SeqLock. There is only ever one writer to this data.
     // See gamepad_shared_buffer.h.
@@ skipping 58 matching lines @@
     ever_had_user_gesture_ = true;
     for (size_t i = 0; i < user_gesture_observers_.size(); i++) {
       user_gesture_observers_[i].task_runner->PostTask(
           FROM_HERE, user_gesture_observers_[i].closure);
     }
     user_gesture_observers_.clear();
   }
 }
 
 }  // namespace device