Revert 239758 "Enable Audio/Video dev monitoring and Video captu..."

> Enable Audio/Video dev monitoring and Video capture via AVFoundation by default.
> 
> Flipping the command line flag from explicitly enabling AVFoundation to
> disable AVFoundation.
> 
> In the past there was a startup performance regression (http://crbug.com/311325 
> and http://crbug.com/311437), those type of regression should be monitored 
> carefully during the next couple of days.
> 
> BUG=288562
> 
> Review URL: https://codereview.chromium.org/101753003

TBR=mcasas@chromium.org

Review URL: https://codereview.chromium.org/112033003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239920 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 4 insertions, 5 deletions

diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index 88113e6..3a8fb33 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -56,14 +56,13 @@ const char kAlsaOutputDevice[] = "alsa-output-device";
 // tested.  See http://crbug.com/158170.
 // TODO(dalecurtis): Remove this once we're sure nothing has exploded.
 const char kDisableMainThreadAudio[] = "disable-main-thread-audio";
-
 // AVFoundation is available in versions 10.7 and onwards, and is to be used
 // http://crbug.com/288562 for both audio and video device monitoring and for
 // video capture. Being a dynamically loaded NSBundle and library, it hits the
 // Chrome startup time (http://crbug.com/311325 and http://crbug.com/311437);
 // until development is finished and the library load time issue is solved, the
-// usage of this library can be disabled by using this flag.
-const char kDisableAVFoundation[] = "disable-avfoundation";
+// usage of this library is hidden behind this flag.
+const char kEnableAVFoundation[] = "enable-avfoundation";
 #endif
 
 #if defined(OS_WIN)
diff --git a/media/base/media_switches.h b/media/base/media_switches.h
index 70381f5..0c7fa24 100644
--- a/media/base/media_switches.h
+++ b/media/base/media_switches.h
@@ -40,7 +40,7 @@ MEDIA_EXPORT extern const char kAlsaOutputDevice[];
 
 #if defined(OS_MACOSX)
 MEDIA_EXPORT extern const char kDisableMainThreadAudio[];
-MEDIA_EXPORT extern const char kDisableAVFoundation[];
+MEDIA_EXPORT extern const char kEnableAVFoundation[];
 #endif
 
 #if defined(OS_WIN)
diff --git a/media/video/capture/mac/avfoundation_glue.mm b/media/video/capture/mac/avfoundation_glue.mm
index 12d4ad5..1610d0f 100644
--- a/media/video/capture/mac/avfoundation_glue.mm
+++ b/media/video/capture/mac/avfoundation_glue.mm
@@ -57,7 +57,7 @@ static NSString* ReadNSStringPtr(const char* symbol) {
 
 bool AVFoundationGlue::IsAVFoundationSupported() {
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
-  return !cmd_line->HasSwitch(switches::kDisableAVFoundation) &&
+  return cmd_line->HasSwitch(switches::kEnableAVFoundation) &&
       base::mac::IsOSLionOrLater() && [AVFoundationBundle() load];
 }