Validate image files before writing them to media galleries.

webkit/browser/fileapi/mock_file_system_context.cc

Index: webkit/browser/fileapi/mock_file_system_context.cc
diff --git a/webkit/browser/fileapi/mock_file_system_context.cc b/webkit/browser/fileapi/mock_file_system_context.cc
index f6c930a438735f9a24eae2911bde567778079436..5e222b8185ae982063fcdc776ae0722852894a0f 100644
--- a/webkit/browser/fileapi/mock_file_system_context.cc
+++ b/webkit/browser/fileapi/mock_file_system_context.cc
@@ -22,6 +22,14 @@ FileSystemContext* CreateFileSystemContextForTesting(
   additional_providers.push_back(
       new TestMountPointProvider(
           base::MessageLoopProxy::current(), base_path));
+  return CreateFileSystemContextWithAdditionalProvidersForTesting(
+      quota_manager_proxy, additional_providers.Pass(), base_path);
+}
+
+FileSystemContext* CreateFileSystemContextWithAdditionalProvidersForTesting(
+    quota::QuotaManagerProxy* quota_manager_proxy,
+    ScopedVector<FileSystemMountPointProvider> additional_providers,
+    const base::FilePath& base_path) {
   return new FileSystemContext(
       FileSystemTaskRunners::CreateMockTaskRunners(),
       ExternalMountPoints::CreateRefCounted().get(),