Support contents upload on FakeDriveService

chrome/browser/google_apis/test_util.cc

Index: chrome/browser/google_apis/test_util.cc
diff --git a/chrome/browser/google_apis/test_util.cc b/chrome/browser/google_apis/test_util.cc
index 84dab6cd709b89c39b0666bf9d1a65598972a382..f11de74f2a69e2e3fb814b4abed7022a0752f4b8 100644
--- a/chrome/browser/google_apis/test_util.cc
+++ b/chrome/browser/google_apis/test_util.cc
@@ -97,6 +97,24 @@ bool WriteStringToFile(const base::FilePath& file_path,
   return content.size() == static_cast<size_t>(result);
 }
 
+bool ReadFile(const base::FilePath& file_path,
+              int64 offset,
+              char* buffer,
+              int size) {
+  bool created = false;
+  base::PlatformFileError error = base::PLATFORM_FILE_ERROR_FAILED;
+  base::PlatformFile file = base::CreatePlatformFile(
+      file_path,
+      base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
+      &created, &error);
+  if (error != base::PLATFORM_FILE_OK)
+    return false;
+
+  int result = base::ReadPlatformFile(file, offset, buffer, size);
+  base::ClosePlatformFile(file);
+  return result == size;
+}
+
 bool CreateFileOfSpecifiedSize(const base::FilePath& temp_dir,
                                size_t size,
                                base::FilePath* path,