Set up the infrastructure for Extension event metrics.

This patch adds extension_event_histogram_value.h with a value for every
Extension event (scraped using the Docserver), changes the Event struct
constructor to require one, then makes every caller pass in UNKNOWN.
These are steps 1 and 2 in the bug.

Next I will be submitting bite-sized changes to use the real histogram values.

BUG=503402
R=rdevlin.cronin@chromium.org, isherman@chromium.org
TBR=achuith@chromium.org, rkc@chromium.org, dewittj@chromium.org, tommi@chromium.org, msw@chromium.org

Review URL: https://codereview.chromium.org/1201063002

Cr-Commit-Position: refs/heads/master@{#336003}

1 files changed, 6 insertions, 5 deletions

diff --git a/extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_event_router.cc b/extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_event_router.cc
index e1f59fb..6884735 100644
--- a/extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_event_router.cc
+++ b/extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_event_router.cc
@@ -866,8 +866,8 @@ void BluetoothLowEnergyEventRouter::GattServiceRemoved(
 
   scoped_ptr<base::ListValue> args =
       apibtle::OnServiceRemoved::Create(api_service);
-  scoped_ptr<Event> event(
-      new Event(apibtle::OnServiceRemoved::kEventName, args.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, apibtle::OnServiceRemoved::kEventName, args.Pass()));
   EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
 }
 
@@ -887,8 +887,8 @@ void BluetoothLowEnergyEventRouter::GattDiscoveryCompleteForService(
 
   scoped_ptr<base::ListValue> args =
       apibtle::OnServiceAdded::Create(api_service);
-  scoped_ptr<Event> event(
-      new Event(apibtle::OnServiceAdded::kEventName, args.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, apibtle::OnServiceAdded::kEventName, args.Pass()));
   EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
 }
 
@@ -1160,7 +1160,8 @@ void BluetoothLowEnergyEventRouter::DispatchEventToExtensionsWithPermission(
 
     // Send the event.
     scoped_ptr<base::ListValue> args_copy(args->DeepCopy());
-    scoped_ptr<Event> event(new Event(event_name, args_copy.Pass()));
+    scoped_ptr<Event> event(
+        new Event(events::UNKNOWN, event_name, args_copy.Pass()));
     EventRouter::Get(browser_context_)->DispatchEventToExtension(
         extension_id, event.Pass());
   }