Introduce Stream::flush [1/2 blink]

Source/platform/blob/BlobRegistry.cpp

Index: Source/platform/blob/BlobRegistry.cpp
diff --git a/Source/platform/blob/BlobRegistry.cpp b/Source/platform/blob/BlobRegistry.cpp
index fb8f5c0aeecc7af6b544511d2658c0d2438ef59b..41cc90fbed94cae65d3ed9bb69753c7830717f69 100644
--- a/Source/platform/blob/BlobRegistry.cpp
+++ b/Source/platform/blob/BlobRegistry.cpp
@@ -212,6 +212,24 @@ void BlobRegistry::addDataToStream(const KURL& url, PassRefPtr<RawData> streamDa
     }
 }
 
+static void flushStreamTask(void* context)
+{
+    OwnPtr<BlobRegistryContext> blobRegistryContext = adoptPtr(static_cast<BlobRegistryContext*>(context));
+    if (WebBlobRegistry* registry = blobRegistry())
+        registry->flushStream(blobRegistryContext->url);
+}
+
+void BlobRegistry::flushStream(const KURL& url)
+{
+    if (isMainThread()) {
+        if (WebBlobRegistry* registry = blobRegistry())
+            registry->flushStream(url);
+    } else {
+        OwnPtr<BlobRegistryContext> context = adoptPtr(new BlobRegistryContext(url));
+        callOnMainThread(&flushStreamTask, context.leakPtr());
+    }
+}
+
 static void finalizeStreamTask(void* context)
 {
     OwnPtr<BlobRegistryContext> blobRegistryContext = adoptPtr(static_cast<BlobRegistryContext*>(context));