Added UMA collection for fullscreen / mouse lock bubble re-shows.

chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc

Index: chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc
diff --git a/chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc b/chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc
index 3559f376a678aa8b5671f2a8e86a92ff8d2964b1..37c9dae5775309820416d6285c87536b122a9b7c 100644
--- a/chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc
+++ b/chrome/browser/ui/exclusive_access/exclusive_access_controller_base.cc
@@ -16,8 +16,7 @@ using content::WebContents;
 
 ExclusiveAccessControllerBase::ExclusiveAccessControllerBase(
     ExclusiveAccessManager* manager)
-    : manager_(manager), tab_with_exclusive_access_(nullptr) {
-}
+    : manager_(manager) {}
 
 ExclusiveAccessControllerBase::~ExclusiveAccessControllerBase() {
 }
@@ -66,6 +65,19 @@ void ExclusiveAccessControllerBase::Observe(
     ExitExclusiveAccessIfNecessary();
 }
 
+void ExclusiveAccessControllerBase::RecordBubbleReshownUMA() {
+  ++bubble_reshow_count_;
+}
+
+void ExclusiveAccessControllerBase::RecordExitingUMA() {
+  // Record the number of bubble reshows during this session. Only if simplified
+  // fullscreen is enabled.
+  if (ExclusiveAccessManager::IsSimplifiedFullscreenUIEnabled())
+    RecordBubbleReshowsHistogram(bubble_reshow_count_);
+
+  bubble_reshow_count_ = 0;
+}
+
 void ExclusiveAccessControllerBase::SetTabWithExclusiveAccess(
     WebContents* tab) {
   // Tab should never be replaced with another tab, or