Image Capture: fill in PhotoCapabilities.{height,width} in Linux/CrOs/Mac

media/capture/video/mac/video_capture_device_mac.mm

Index: media/capture/video/mac/video_capture_device_mac.mm
diff --git a/media/capture/video/mac/video_capture_device_mac.mm b/media/capture/video/mac/video_capture_device_mac.mm
index a3c0166372582f13e3e8665c74e43ebcee8739e3..27eb401eb708eabfc6fcf1e4a0e81aeb443ce0b3 100644
--- a/media/capture/video/mac/video_capture_device_mac.mm
+++ b/media/capture/video/mac/video_capture_device_mac.mm
@@ -384,6 +384,35 @@ void VideoCaptureDeviceMac::TakePhoto(TakePhotoCallback callback) {
   [capture_device_ takePhoto];
 }
 
+void VideoCaptureDeviceMac::GetPhotoCapabilities(
+    GetPhotoCapabilitiesCallback callback) {
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
+  auto photo_capabilities = mojom::PhotoCapabilities::New();
+
+  photo_capabilities->exposure_compensation = mojom::Range::New();
+  photo_capabilities->color_temperature = mojom::Range::New();
+  photo_capabilities->iso = mojom::Range::New();
+
+  photo_capabilities->brightness = mojom::Range::New();
+  photo_capabilities->contrast = mojom::Range::New();
+  photo_capabilities->saturation = mojom::Range::New();
+  photo_capabilities->sharpness = mojom::Range::New();
+
+  photo_capabilities->zoom = mojom::Range::New();
+
+  photo_capabilities->red_eye_reduction = mojom::RedEyeReduction::NEVER;
+  photo_capabilities->height = mojom::Range::New(
+      capture_format_.frame_size.height(), capture_format_.frame_size.height(),
+      capture_format_.frame_size.height(), 0 /* step */);
+  photo_capabilities->width = mojom::Range::New(
+      capture_format_.frame_size.width(), capture_format_.frame_size.width(),
+      capture_format_.frame_size.width(), 0 /* step */);
+  photo_capabilities->torch = false;
+
+  callback.Run(std::move(photo_capabilities));
+}
+
 bool VideoCaptureDeviceMac::Init(VideoCaptureApi capture_api_type) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_EQ(state_, kNotInitialized);