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 f2f3fe991838631fd804e1af30fad172f278079c..7e122398795f9aa9646a25252fb85c311319bfa7 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);
 }