[Downloads] Move client guid for AV scanning of downloaded files to chrome/

chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc

Index: chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc
diff --git a/chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc b/chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc
index 9ae76253c3bb4db6d4584970202449ed06684405..b5441b31073eae55f78ddb11f948491fd2b65bed 100644
--- a/chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc
+++ b/chrome/browser/media_galleries/fileapi/supported_image_type_validator.cc
@@ -16,6 +16,10 @@
 #include "chrome/browser/image_decoder.h"
 #include "content/public/browser/browser_thread.h"
 
+#if defined(OS_WIN)
+#include "base/file_util.h"
+#endif
+
 using content::BrowserThread;
 
 namespace chrome {
@@ -84,6 +88,25 @@ class ImageDecoderDelegateAdapter : public ImageDecoder::Delegate {
   DISALLOW_COPY_AND_ASSIGN(ImageDecoderDelegateAdapter);
 };
 
+#if defined(OS_WIN)
+base::PlatformFileError ScanFile(const base::FilePath& dest_platform_path) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  base::PlatformFileError result = base::PLATFORM_FILE_OK;
+
+  // Execute an AV check of the transferred file. S_OK means
+  // the file was OK. Other results may indicate the file was
+  // deleted. Any other results, including E_FAIL and
+  // INET_E_SECURITY_PROBLEM, are notified as security errors.
+  HRESULT scan_result =
+      base::ScanAndSaveDownloadedFile(dest_platform_path, std::string());
+  if (scan_result != S_OK)
+    result = base::PLATFORM_FILE_ERROR_SECURITY;
+
+  return result;
+}
+#endif
+
+
 }  // namespace
 
 SupportedImageTypeValidator::~SupportedImageTypeValidator() {}
@@ -120,13 +143,16 @@ void SupportedImageTypeValidator::StartPostWriteValidation(
     const base::FilePath& dest_platform_path,
     const ResultCallback& result_callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  post_write_callback_ = result_callback;
 
-  // TODO(gbillock): Insert AV call here in the right validator.
-  BrowserThread::PostTask(
-      BrowserThread::IO,
+#if defined(OS_WIN)
+  BrowserThread::PostTaskAndReplyWithResult(
+      BrowserThread::FILE,
       FROM_HERE,
-      base::Bind(post_write_callback_, base::PLATFORM_FILE_OK));
+      base::Bind(&ScanFile, dest_platform_path),
+      result_callback);
+#else
+  result_callback.Run(base::PLATFORM_FILE_OK);
+#endif
 }
 
 SupportedImageTypeValidator::SupportedImageTypeValidator(