net: Update FileStream to use base::File instead of PlatformFile.

base/android/content_uri_utils.cc

Index: base/android/content_uri_utils.cc
diff --git a/base/android/content_uri_utils.cc b/base/android/content_uri_utils.cc
index 64d6ad24226e3c72a7a6a945c221dec12f9bdfe1..0e0c0ea6bb127840862a9e0689aa5a89be4a5950 100644
--- a/base/android/content_uri_utils.cc
+++ b/base/android/content_uri_utils.cc
@@ -6,7 +6,6 @@
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
-#include "base/platform_file.h"
 #include "jni/ContentUriUtils_jni.h"
 
 using base::android::ConvertUTF8ToJavaString;
@@ -25,15 +24,15 @@ bool ContentUriExists(const FilePath& content_uri) {
       env, base::android::GetApplicationContext(), j_uri.obj());
 }
 
-int OpenContentUriForRead(const FilePath& content_uri) {
+File OpenContentUriForRead(const FilePath& content_uri) {
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jstring> j_uri =
       ConvertUTF8ToJavaString(env, content_uri.value());
   jint fd = Java_ContentUriUtils_openContentUriForRead(
       env, base::android::GetApplicationContext(), j_uri.obj());
   if (fd < 0)
-    return base::kInvalidPlatformFileValue;
-  return fd;
+    return File();
+  return File(fd);
 }
 
 }  // namespace base