Add Stream support to FileReaderLoader.

Source/core/fileapi/FileReaderLoader.cpp

Index: Source/core/fileapi/FileReaderLoader.cpp
diff --git a/Source/core/fileapi/FileReaderLoader.cpp b/Source/core/fileapi/FileReaderLoader.cpp
index c6d340330c3ac48c5dd14152e37d2f54b3968995..0e6f2a7694f656134eac5c29da024de4a460843f 100644
--- a/Source/core/fileapi/FileReaderLoader.cpp
+++ b/Source/core/fileapi/FileReaderLoader.cpp
@@ -37,6 +37,7 @@
 #include "core/fileapi/BlobRegistry.h"
 #include "core/fileapi/BlobURL.h"
 #include "core/fileapi/FileReaderLoaderClient.h"
+#include "core/fileapi/Stream.h"
 #include "core/loader/TextResourceDecoder.h"
 #include "core/loader/ThreadableLoader.h"
 #include "core/platform/network/ResourceRequest.h"
@@ -76,7 +77,7 @@ FileReaderLoader::~FileReaderLoader()
         BlobRegistry::unregisterBlobURL(m_urlForReading);
 }
 
-void FileReaderLoader::start(ScriptExecutionContext* scriptExecutionContext, Blob* blob)
+void FileReaderLoader::startForURL(ScriptExecutionContext* scriptExecutionContext, const KURL& url)
 {
     // The blob is read by routing through the request handling layer given a temporary public url.
     m_urlForReading = BlobURL::createPublicURL(scriptExecutionContext->securityOrigin());
@@ -84,7 +85,7 @@ void FileReaderLoader::start(ScriptExecutionContext* scriptExecutionContext, Blo
         failed(FileError::SECURITY_ERR);
         return;
     }
-    BlobRegistry::registerBlobURL(scriptExecutionContext->securityOrigin(), m_urlForReading, blob->url());
+    BlobRegistry::registerBlobURL(scriptExecutionContext->securityOrigin(), m_urlForReading, url);
 
     // Construct and load the request.
     ResourceRequest request(m_urlForReading);
@@ -107,6 +108,16 @@ void FileReaderLoader::start(ScriptExecutionContext* scriptExecutionContext, Blo
         ThreadableLoader::loadResourceSynchronously(scriptExecutionContext, request, *this, options);
 }
 
+void FileReaderLoader::start(ScriptExecutionContext* scriptExecutionContext, Blob* blob)
+{
+    startForURL(scriptExecutionContext, blob->url());
+}
+
+void FileReaderLoader::start(ScriptExecutionContext* scriptExecutionContext, Stream* stream)

[tkent, 2013/07/12 09:03:49]

nit: We assume |steram| is non-0.  So we had better make the argument type
"const Stream&."

[tyoshino (SeeGerritForStatus), 2013/07/12 11:15:17]

Done

+{
+    startForURL(scriptExecutionContext, stream->url());
+}
+
 void FileReaderLoader::cancel()
 {
     m_errorCode = FileError::ABORT_ERR;