Add UMA for the new generic permisison class

chrome/browser/content_settings/permission_context_base.cc

Index: chrome/browser/content_settings/permission_context_base.cc
diff --git a/chrome/browser/content_settings/permission_context_base.cc b/chrome/browser/content_settings/permission_context_base.cc
index 05504c5bed8cdf34c4c32442e50c0fe077303bca..ca212baed8d333f7050bf9dcd9c0be77a0569207 100644
--- a/chrome/browser/content_settings/permission_context_base.cc
+++ b/chrome/browser/content_settings/permission_context_base.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/content_settings/permission_context_base.h"
 
 #include "base/logging.h"
+#include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/content_settings/permission_bubble_request_impl.h"
@@ -19,6 +20,22 @@
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 
+namespace {
+
+// Helper function for UMA tracking purposes.
+PermissionType SettingToPermission(ContentSettingsType permission) {
+  switch (permission) {
+    case CONTENT_SETTINGS_TYPE_MIDI_SYSEX:
+      return PERMISSION_MIDI_SYSEX;
+    case CONTENT_SETTINGS_TYPE_PUSH_MESSAGING:
+      return PERMISSION_PUSH_MESSAGING;
+    default:
+      NOTREACHED() << "PERMISSION " << permission << " not accounted for";
+  }
+  return PERMISSION_UNKNOWN;
+}
+
+} // namespace
 
 PermissionContextBase::PermissionContextBase(
     Profile* profile,
@@ -40,7 +57,6 @@ void PermissionContextBase::RequestPermission(
     const GURL& requesting_frame,
     bool user_gesture,
     const BrowserPermissionCallback& callback) {
-  // TODO(miguelg): Add UMA instrumentation.
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
   DecidePermission(web_contents,
@@ -65,16 +81,21 @@ void PermissionContextBase::DecidePermission(
           requesting_origin, embedder_origin, permission_type_, std::string());
   switch (content_setting) {
     case CONTENT_SETTING_BLOCK:
-      PermissionDecided(
-          id, requesting_origin, embedder_origin, callback, false);
+      NotifyPermissionSet(id, requesting_origin, embedder_origin,
+                           callback, false /* persist */, false /* granted */);
       return;
     case CONTENT_SETTING_ALLOW:
-      PermissionDecided(id, requesting_origin, embedder_origin, callback, true);
+      NotifyPermissionSet(id, requesting_origin, embedder_origin,
+                           callback, false /* persist */, true /* granted */);
       return;
     default:
       break;
   }
 
+  UMA_HISTOGRAM_ENUMERATION("ContentSettings.PermissionRequested",
+                            SettingToPermission(permission_type_),
+                            PERMISSION_NUM);
+
   if (PermissionBubbleManager::Enabled()) {
     PermissionBubbleManager* bubble_manager =
         PermissionBubbleManager::FromWebContents(web_contents);
@@ -85,7 +106,7 @@ void PermissionContextBase::DecidePermission(
             user_gesture,
             permission_type_,
             profile_->GetPrefs()->GetString(prefs::kAcceptLanguages),
-            base::Bind(&PermissionContextBase::NotifyPermissionSet,
+            base::Bind(&PermissionContextBase::PermissionDecided,
                        weak_factory_.GetWeakPtr(),
                        id,
                        requesting_origin,
@@ -109,7 +130,7 @@ void PermissionContextBase::DecidePermission(
       requesting_origin,
       embedder_origin,
       std::string(),
-      base::Bind(&PermissionContextBase::NotifyPermissionSet,
+      base::Bind(&PermissionContextBase::PermissionDecided,
                  weak_factory_.GetWeakPtr(),
                  id,
                  requesting_origin,
@@ -125,10 +146,20 @@ void PermissionContextBase::PermissionDecided(
     const GURL& requesting_origin,
     const GURL& embedder_origin,
     const BrowserPermissionCallback& callback,
+    bool persist,
     bool allowed) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  if (allowed) {
+    UMA_HISTOGRAM_ENUMERATION("ContentSettings.PermissionGranted",
+                              SettingToPermission(permission_type_),
+                              PERMISSION_NUM);
+  } else {
+    UMA_HISTOGRAM_ENUMERATION("ContentSettings.PermissionDenied",
+                              SettingToPermission(permission_type_),
+                              PERMISSION_NUM);
+  }
+
   NotifyPermissionSet(
-      id, requesting_origin, embedder_origin, callback, false, allowed);
+      id, requesting_origin, embedder_origin, callback, persist, allowed);
 }
 
 PermissionQueueController* PermissionContextBase::GetQueueController() {