Fix few trivial Coverity issues, mainly PASS_BY_VALUE.

base/directory_watcher_unittest.cc

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/directory_watcher.h"
 
 #include <limits>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #if defined(OS_WIN)
 #include "base/win_util.h"
 #endif  // defined(OS_WIN)
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // For tests where we wait a bit to verify nothing happened
 const int kWaitForEventTime = 1000;
 
 class DirectoryWatcherTest : public testing::Test {
  public:
   // Implementation of DirectoryWatcher on Mac requires UI loop.
-  DirectoryWatcherTest() : loop_(MessageLoop::TYPE_UI) {
+  DirectoryWatcherTest()
+      : loop_(MessageLoop::TYPE_UI),
+        notified_delegates_(0),
+        expected_notified_delegates_(0) {
   }
 
   void OnTestDelegateFirstNotification(const FilePath& path) {
     notified_delegates_++;
     if (notified_delegates_ >= expected_notified_delegates_)
       MessageLoop::current()->Quit();
   }
 
  protected:
   virtual void SetUp() {
@@ skipping 361 matching lines @@
 // Verify that watching a directory that doesn't exist fails, but doesn't
 // asssert.
 // Basic test: add a file and verify we notice it.
 TEST_F(DirectoryWatcherTest, NonExistentDirectory) {
   DirectoryWatcher watcher;
   ASSERT_FALSE(watcher.Watch(test_dir_.AppendASCII("does-not-exist"),
                              NULL, NULL, false));
 }
 
 }  // namespace