Enable subresource redirect finch param by default

Enabling the redirection by default simplifies enabling the feature in
chrome-flags.

Change-Id: I9b4b0bd870ac431d4579c59c1b1d95331a57472c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2349972Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Commit-Queue: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796995}

chrome/browser/subresource_redirect/subresource_redirect_observer.cc

@@ -81,7 +81,7 @@ bool ShouldCompressionServerRedirectSubresource() {
   return base::FeatureList::IsEnabled(blink::features::kSubresourceRedirect) &&
          base::GetFieldTrialParamByFeatureAsBool(
              blink::features::kSubresourceRedirect,
-             "enable_subresource_server_redirect", false);
+             "enable_subresource_server_redirect", true);
 }
 
 bool ShowInfoBarOnAndroid(content::WebContents* web_contents) {

chrome/renderer/subresource_redirect/subresource_redirect_url_loader_throttle.cc

@@ -43,7 +43,7 @@ bool IsCompressionServerOrigin(const GURL& url) {
 bool ShouldCompressionServerRedirectSubresource() {
   return base::GetFieldTrialParamByFeatureAsBool(
       blink::features::kSubresourceRedirect,
-      "enable_subresource_server_redirect", false);
+      "enable_subresource_server_redirect", true);
 }
 
 base::TimeDelta GetCompressionRedirectTimeout() {

testing/variations/fieldtrial_testing_config.json

@@ -6834,7 +6834,7 @@
                 {
                     "name": "Enabled",
                     "params": {
-                        "enable_subresource_server_redirect": "false"
+                        "enable_subresource_server_redirect": "true"
                     },
                     "enable_features": [
                         "SubresourceRedirect"