Add command line flag --disable-webrtc-encryption for dev and canary channels

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index e4347f8edd524a8b1ac01c4988b837de54b0225c..c3a9a9925322f3c8abd6708c81ce09074603a71c 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -93,6 +93,7 @@
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/chrome_version_info.h"
 #include "chrome/common/env_vars.h"
 #include "chrome/common/extensions/background_info.h"
 #include "chrome/common/extensions/extension.h"
@@ -1428,6 +1429,19 @@ void ChromeContentBrowserClient::AppendExtraCommandLineSwitches(
           chromeos::switches::kLoginProfile, login_profile);
 #endif
 
+#if defined(ENABLE_WEBRTC)
+    VersionInfo::Channel channel = VersionInfo::GetChannel();
+    if (channel == VersionInfo::CHANNEL_DEV ||
+        channel == VersionInfo::CHANNEL_CANARY) {
+      static const char* const kWebRtcDevSwitchNames[] = {
+        switches::kDisableWebRtcEncryption,
+      };
+      command_line->CopySwitchesFrom(browser_command_line,
+                                     kWebRtcDevSwitchNames,
+                                     arraysize(kWebRtcDevSwitchNames));
+    }
+#endif
+
     content::RenderProcessHost* process =
         content::RenderProcessHost::FromID(child_process_id);
     if (process) {