Media Capture Depth Stream Extensions API: focal length and depth range.

content/browser/renderer_host/media/video_capture_manager.cc

Index: content/browser/renderer_host/media/video_capture_manager.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager.cc b/content/browser/renderer_host/media/video_capture_manager.cc
index e1830eed9fa09a7704246e7d7ac534ed97e5d574..fa4955d3186284d3db87113341a304d6df81cda0 100644
--- a/content/browser/renderer_host/media/video_capture_manager.cc
+++ b/content/browser/renderer_host/media/video_capture_manager.cc
@@ -1025,6 +1025,9 @@ void VideoCaptureManager::OnDevicesInfoEnumerated(
   for (const auto& it : devices_info_cache_) {
     devices.emplace_back(it.descriptor);
     descriptors_and_formats.emplace_back(it.descriptor, it.supported_formats);
+  }
+
+  if (!descriptors_and_formats.empty()) {
     MediaInternals::GetInstance()->UpdateVideoCaptureDeviceCapabilities(
         descriptors_and_formats);
   }
@@ -1227,6 +1230,22 @@ void VideoCaptureManager::DoTakePhoto(
                             base::Unretained(device), base::Passed(&callback)));
 }
 
+bool VideoCaptureManager::GetCameraCalibration(
+    const std::string& device_id,
+    MediaStreamDevice::CameraCalibration* calibration) {
+  VideoCaptureManager::DeviceInfo* info = GetDeviceInfoById(device_id);
+  if (!info || !info->descriptor.camera_calibration)
+    return false;
+  calibration->valid = true;
+  calibration->focal_length_x =
+      info->descriptor.camera_calibration->focal_length_x;
+  calibration->focal_length_y =
+      info->descriptor.camera_calibration->focal_length_y;
+  calibration->depth_near = info->descriptor.camera_calibration->depth_near;
+  calibration->depth_far = info->descriptor.camera_calibration->depth_far;
+  return true;
+}
+
 #if defined(OS_ANDROID)
 void VideoCaptureManager::OnApplicationStateChange(
     base::android::ApplicationState state) {