Mac Video Capture: Change an ErrorMessage to LogMessage

media/video/capture/mac/video_capture_device_qtkit_mac.mm

 // Copyright (c) 2012 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.
 
 #import "media/video/capture/mac/video_capture_device_qtkit_mac.h"
 
 #import <QTKit/QTKit.h>
 
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
@@ skipping 122 matching lines @@
     NSDictionary *captureDictionary = [NSDictionary
         dictionaryWithObject:
             [NSNumber numberWithUnsignedInt:kCVPixelFormatType_422YpCbCr8]
                       forKey:(id)kCVPixelBufferPixelFormatTypeKey];
     [captureDecompressedOutput setPixelBufferAttributes:captureDictionary];
 
     return YES;
   } else {
     // Remove the previously set capture device.
     if (!captureDeviceInput_) {
-      [self sendErrorString:[NSString
+      // Being here means stopping a device that never started OK in the first
+      // place, log it.
+      [self sendLogString:[NSString
           stringWithUTF8String:"No video capture device set, on removal."]];
       return YES;
     }
     if ([[captureSession_ inputs] count] > 0) {
       // The device is still running.
       [self stopCapture];
     }
     if ([[captureSession_ outputs] count] > 0) {
       // Only one output is set for |captureSession_|.
       DCHECK_EQ([[captureSession_ outputs] count], 1u);
@@ skipping 184 matching lines @@
 }
 
 - (void)sendErrorString:(NSString*)error {
   DLOG(ERROR) << [error UTF8String];
   [lock_ lock];
   if (frameReceiver_)
     frameReceiver_->ReceiveError([error UTF8String]);
   [lock_ unlock];
 }
 
+- (void)sendLogString:(NSString*)message {
+  DVLOG(1) << [message UTF8String];
+  [lock_ lock];
+  if (frameReceiver_)
+    frameReceiver_->LogMessage([message UTF8String]);
+  [lock_ unlock];
+}
+
 @end