Move enable_webrtc to a buildflag header.

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index e038d2bc1108721538e3841aff4aa289a18a7e2b..6f41e6dc2e9c9e386d112a4d2d5331d060945627 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -135,7 +135,7 @@
 #define WebScrollbarBehaviorImpl blink::WebScrollbarBehavior
 #endif
 
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
 #include "content/renderer/media/rtc_certificate_generator.h"
 #include "content/renderer/media/webrtc/peer_connection_dependency_factory.h"
 #endif
@@ -816,7 +816,7 @@ void RendererBlinkPlatformImpl::sampleGamepads(WebGamepads& gamepads) {
 
 WebMediaRecorderHandler*
 RendererBlinkPlatformImpl::createMediaRecorderHandler() {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   return new content::MediaRecorderHandler();
 #else
   return nullptr;
@@ -833,7 +833,7 @@ RendererBlinkPlatformImpl::createRTCPeerConnectionHandler(
   if (!render_thread)
     return NULL;
 
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   WebRTCPeerConnectionHandler* peer_connection_handler =
       GetContentClient()->renderer()->OverrideCreateWebRTCPeerConnectionHandler(
           client);
@@ -845,18 +845,18 @@ RendererBlinkPlatformImpl::createRTCPeerConnectionHandler(
   return rtc_dependency_factory->CreateRTCPeerConnectionHandler(client);
 #else
   return NULL;
-#endif  // defined(ENABLE_WEBRTC)
+#endif  // BUILDFLAG(ENABLE_WEBRTC)
 }
 
 //------------------------------------------------------------------------------
 
 blink::WebRTCCertificateGenerator*
 RendererBlinkPlatformImpl::createRTCCertificateGenerator() {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   return new RTCCertificateGenerator();
 #else
   return nullptr;
-#endif  // defined(ENABLE_WEBRTC)
+#endif  // BUILDFLAG(ENABLE_WEBRTC)
 }
 
 //------------------------------------------------------------------------------
@@ -883,12 +883,12 @@ WebCanvasCaptureHandler* RendererBlinkPlatformImpl::createCanvasCaptureHandler(
     const WebSize& size,
     double frame_rate,
     WebMediaStreamTrack* track) {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   return CanvasCaptureHandler::CreateCanvasCaptureHandler(
       size, frame_rate, RenderThread::Get()->GetIOTaskRunner(), track);
 #else
   return nullptr;
-#endif  // defined(ENABLE_WEBRTC)
+#endif  // BUILDFLAG(ENABLE_WEBRTC)
 }
 
 //------------------------------------------------------------------------------
@@ -896,7 +896,7 @@ WebCanvasCaptureHandler* RendererBlinkPlatformImpl::createCanvasCaptureHandler(
 void RendererBlinkPlatformImpl::createHTMLVideoElementCapturer(
     WebMediaStream* web_media_stream,
     WebMediaPlayer* web_media_player) {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   DCHECK(web_media_stream);
   DCHECK(web_media_player);
   AddVideoTrackToMediaStream(
@@ -911,7 +911,7 @@ void RendererBlinkPlatformImpl::createHTMLVideoElementCapturer(
 void RendererBlinkPlatformImpl::createHTMLAudioElementCapturer(
     WebMediaStream* web_media_stream,
     WebMediaPlayer* web_media_player) {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   DCHECK(web_media_stream);
   DCHECK(web_media_player);
 
@@ -941,11 +941,11 @@ void RendererBlinkPlatformImpl::createHTMLAudioElementCapturer(
 
 WebImageCaptureFrameGrabber*
 RendererBlinkPlatformImpl::createImageCaptureFrameGrabber() {
-#if defined(ENABLE_WEBRTC)
+#if BUILDFLAG(ENABLE_WEBRTC)
   return new ImageCaptureFrameGrabber();
 #else
   return nullptr;
-#endif  // defined(ENABLE_WEBRTC)
+#endif  // BUILDFLAG(ENABLE_WEBRTC)
 }
 
 //------------------------------------------------------------------------------