Add FirstRun.SearchEngineBubble UMA histogram counts.

chrome/browser/ui/cocoa/first_run_bubble_controller.mm

Index: chrome/browser/ui/cocoa/first_run_bubble_controller.mm
diff --git a/chrome/browser/ui/cocoa/first_run_bubble_controller.mm b/chrome/browser/ui/cocoa/first_run_bubble_controller.mm
index 26ac64e5982e56055b0563ec264f0f02c7a168ed..4583023f69dac3ef21615ad6b807aa801adfe9e9 100644
--- a/chrome/browser/ui/cocoa/first_run_bubble_controller.mm
+++ b/chrome/browser/ui/cocoa/first_run_bubble_controller.mm
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/search_engines/util.h"
 #include "chrome/browser/ui/browser_list.h"
 #import "chrome/browser/ui/cocoa/l10n_util.h"
@@ -51,6 +52,8 @@
 }
 
 - (void)awakeFromNib {
+  first_run::LogFirstRunMetric(first_run::FIRST_RUN_BUBBLE_SHOWN);
+
   DCHECK(header_);
   [header_ setStringValue:cocoa_l10n_util::ReplaceNSStringPlaceholders(
       [header_ stringValue], GetDefaultSearchEngineName(profile_), NULL)];
@@ -81,6 +84,8 @@
 }
 
 - (IBAction)onChange:(id)sender {
+  first_run::LogFirstRunMetric(first_run::FIRST_RUN_BUBBLE_CHANGE_INVOKED);
+
   Browser* browser = BrowserList::GetLastActiveWithProfile(profile_);
   [self close];
   if (browser)