Turn UseVideoCaptureApiForDevtoolsSnapshots on by default

There has been a 50/50 finch trial on canary and dev going on for this
feature and no issues has been reported.

Bug: 813929
Change-Id: I79012e9cfa06dfac57c73479aa80d09a050c0395
Reviewed-on: https://chromium-review.googlesource.com/1032889Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Saman Sami <samans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554507}

content/public/common/content_features.cc

@@ -432,8 +432,7 @@ const base::Feature kUserActivationV2{"UserActivationV2",
 // captured from the renderer for DevTools performance timeline and eyedropper
 // tool.
 const base::Feature kUseVideoCaptureApiForDevToolsSnapshots{
-    "UseVideoCaptureApiForDevToolsSnapshots",
-    base::FEATURE_DISABLED_BY_DEFAULT};
+    "UseVideoCaptureApiForDevToolsSnapshots", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enables to use a snapshot file in creating V8 contexts.
 const base::Feature kV8ContextSnapshot{"V8ContextSnapshot",