Media Stream Image Capture (4): wire takePhoto and implement in FakeVCDevice

third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp

Index: third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp
diff --git a/third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp b/third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp
index 874ca5578d252106112507791730a00a920dc7ed..658a6336b5c9a93a97957075f0d6c7796ec86d62 100644
--- a/third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp
+++ b/third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp
@@ -142,9 +142,12 @@ void ImageCapture::onTakePhoto(ScriptPromiseResolver* resolver, const String& mi
     if (!m_serviceRequests.contains(resolver))
         return;
 
-    DCHECK(!data.is_null());
-    const auto& storage = data.storage();
-    resolver->resolve(Blob::create(storage.data(), storage.size(), mimeType));
+    if (data.is_null() || data.empty()) {
+        resolver->reject(DOMException::create(UnknownError, "platform error"));
+    } else {
+        const auto& storage = data.storage();
+        resolver->resolve(Blob::create(storage.data(), storage.size(), mimeType));
+    }
     m_serviceRequests.remove(resolver);
 }