[navigation] Remove the PerNavigationMojoInterface feature.

Removing the unusued feature.

Bug: 784904
Change-Id: I9d5bed00c0c95b634ce2be7cc1d251be691b2417
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1883074Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Arthur Hemery <ahemery@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710268}

content/public/common/content_features.cc

@@ -360,10 +360,6 @@ const base::Feature kPassiveEventListenersDueToFling{
 const base::Feature kPeriodicBackgroundSync{"PeriodicBackgroundSync",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Whether we should use the navigation_client mojo interface for navigations.
-const base::Feature kPerNavigationMojoInterface = {
-    "PerNavigationMojoInterface", base::FEATURE_ENABLED_BY_DEFAULT};
-
 // If Pepper 3D Image Chromium is allowed, this feature controls whether it is
 // enabled.
 const base::Feature kPepper3DImageChromium {

content/public/common/content_features.h

@@ -84,7 +84,6 @@ CONTENT_EXPORT extern const base::Feature kPassiveDocumentEventListeners;
 CONTENT_EXPORT extern const base::Feature kPassiveDocumentWheelEventListeners;
 CONTENT_EXPORT extern const base::Feature kPassiveEventListenersDueToFling;
 CONTENT_EXPORT extern const base::Feature kPeriodicBackgroundSync;
-CONTENT_EXPORT extern const base::Feature kPerNavigationMojoInterface;
 CONTENT_EXPORT extern const base::Feature kPepper3DImageChromium;
 CONTENT_EXPORT extern const base::Feature kPreferCompositingToLCDText;
 CONTENT_EXPORT extern const base::Feature kPrioritizeBootstrapTasks;

content/public/common/navigation_policy.cc

@@ -26,10 +26,6 @@ void LogArbitraryPolicyPerDownload(NavigationDownloadType type) {
 
 }  // namespace
 
-bool IsPerNavigationMojoInterfaceEnabled() {
-  return base::FeatureList::IsEnabled(features::kPerNavigationMojoInterface);
-}
-
 bool IsBackForwardCacheEnabled() {
   return base::FeatureList::IsEnabled(features::kBackForwardCache);
 }

content/public/common/navigation_policy.h

@@ -15,7 +15,6 @@
 
 namespace content {
 
-CONTENT_EXPORT bool IsPerNavigationMojoInterfaceEnabled();
 CONTENT_EXPORT bool IsBackForwardCacheEnabled();
 CONTENT_EXPORT bool IsProactivelySwapBrowsingInstanceEnabled();
 CONTENT_EXPORT bool IsNavigationImmediateResponseBodyEnabled();