More DCHECK() updates. A mixture of _EQ and _GE.

base/event_recorder.cc

Index: base/event_recorder.cc
diff --git a/base/event_recorder.cc b/base/event_recorder.cc
index 7c3336bde83d1020c2f39ae53e49ce79e81963d4..1119b4f57c0e676bff7ae3a34ee7f3b71f3461e6 100644
--- a/base/event_recorder.cc
+++ b/base/event_recorder.cc
@@ -49,7 +49,7 @@ bool EventRecorder::StartRecording(const FilePath& filename) {
     return false;
 
   // Open the recording file.
-  DCHECK(file_ == NULL);
+  DCHECK(!file_);
   file_ = file_util::OpenFile(filename, "wb+");
   if (!file_) {
     DLOG(ERROR) << "EventRecorder could not open log file";
@@ -100,7 +100,7 @@ bool EventRecorder::StartPlayback(const FilePath& filename) {
     return false;
 
   // Open the recording file.
-  DCHECK(file_ == NULL);
+  DCHECK(!file_);
   file_ = file_util::OpenFile(filename, "rb");
   if (!file_) {
     DLOG(ERROR) << "EventRecorder Playback could not open log file";