arc: Remove kAppRuntimePerormanceStatistics

This CL gets rid of the unused flag kAppRuntimePerormanceStatistics,
this feature has been enabled by default for a while, there is no way to
toggle this flag via chrome://flags anymore so it should be safe to
remove.

Bug: None
Test: Build.
Change-Id: I79e90d2eb45559e4910b25282819d562ad074cb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466867Reviewed-by: David Jacobo <djacobo@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: David Jacobo <djacobo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818537}

components/arc/arc_features.cc

@@ -6,11 +6,6 @@
 
 namespace arc {
 
-// Controls whether ARC++ app runtime performance statistics collection is
-// enabled.
-const base::Feature kAppRuntimePerormanceStatistics{
-    "AppRuntimePerormanceStatistics", base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Controls ACTION_BOOT_COMPLETED broadcast for third party applications on ARC.
 // When disabled, third party apps will not receive this broadcast.
 const base::Feature kBootCompletedBroadcastFeature {

components/arc/arc_features.h

@@ -12,7 +12,6 @@
 namespace arc {
 
 // Please keep alphabetized.
-extern const base::Feature kAppRuntimePerormanceStatistics;
 extern const base::Feature kBootCompletedBroadcastFeature;
 extern const base::Feature kCleanArcDataOnRegularToChildTransitionFeature;
 extern const base::Feature kCustomTabsExperimentFeature;