Linux video capture: handle devices that don't enumerate any frame rates

media/video/capture/linux/video_capture_device_linux.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 "media/video/capture/linux/video_capture_device_linux.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #if defined(OS_OPENBSD)
 #include <sys/videoio.h>
@@ skipping 186 matching lines @@
 }
 
 void VideoCaptureDeviceLinux::SetRotationOnV4L2Thread(int rotation) {
   DCHECK_EQ(v4l2_thread_.message_loop(), base::MessageLoop::current());
   DCHECK(rotation >= 0 && rotation < 360 && rotation % 90 == 0);
   rotation_ = rotation;
 }
 
 void VideoCaptureDeviceLinux::OnAllocateAndStart(int width,
                                                  int height,
-                                                 int frame_rate,
+                                                 float frame_rate,
                                                  scoped_ptr<Client> client) {
   DCHECK_EQ(v4l2_thread_.message_loop(), base::MessageLoop::current());
 
   client_ = client.Pass();
 
   // Need to open camera with O_RDWR after Linux kernel 3.3.
   device_fd_.reset(HANDLE_EINTR(open(device_name_.id().c_str(), O_RDWR)));
   if (!device_fd_.is_valid()) {
     SetErrorState("Failed to open V4L2 device driver.");
     return;
@@ skipping 287 matching lines @@
 }
 
 void VideoCaptureDeviceLinux::SetErrorState(const std::string& reason) {
   DCHECK(!v4l2_thread_.IsRunning() ||
          v4l2_thread_.message_loop() == base::MessageLoop::current());
   state_ = kError;
   client_->OnError(reason);
 }
 
 }  // namespace media