Remove all C++ Telemetry Accumulation calls.

This creates a number of stubs and leaves some surrounding code that may be irrelevant (eg. recorded time stamps, status variables).
Stub resolution/removal should be a follow-up to this.

dom/plugins/ipc/PluginModuleParent.cpp

@@ -20,7 +20,6 @@
 #include "mozilla/Preferences.h"
 #include "mozilla/ProcessHangMonitor.h"
 #include "mozilla/Services.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/Unused.h"
 #include "nsAutoPtr.h"
 #include "nsCRT.h"
@@ -1172,11 +1171,6 @@ PluginModuleParent::GetRunID(uint32_t* aRunID)
 void
 PluginModuleChromeParent::ActorDestroy(ActorDestroyReason why)
 {
-    if (why == AbnormalShutdown) {
-        Telemetry::Accumulate(Telemetry::SUBPROCESS_ABNORMAL_ABORT,
-                              NS_LITERAL_CSTRING("plugin"), 1);
-    }
-
     // We can't broadcast settings changes anymore.
     UnregisterSettingsCallbacks();
 
@@ -2203,12 +2197,8 @@ public:
 void
 PluginModuleParent::AccumulateModuleInitBlockedTime()
 {
-    if (mPluginName.IsEmpty()) {
-        GetPluginDetails();
-    }
-    Telemetry::Accumulate(Telemetry::BLOCKED_ON_PLUGIN_MODULE_INIT_MS,
-                          GetHistogramKey(),
-                          static_cast<uint32_t>(mTimeBlocked.ToMilliseconds()));
+    // XXX: mTimeBlocked can probably go if not used for anything besides
+    // telemetry.
     mTimeBlocked = TimeDuration();
 }