NOCOMMIT: Blink tracing now uses base

third_party/WebKit/Source/platform/PlatformInstrumentation.h

Index: third_party/WebKit/Source/platform/PlatformInstrumentation.h
diff --git a/third_party/WebKit/Source/platform/PlatformInstrumentation.h b/third_party/WebKit/Source/platform/PlatformInstrumentation.h
index ae892b816529f6fe0c48eeaddfdef3dc840f09ea..8e4f2701d071e0ad69796af85adf70c17faa00c4 100644
--- a/third_party/WebKit/Source/platform/PlatformInstrumentation.h
+++ b/third_party/WebKit/Source/platform/PlatformInstrumentation.h
@@ -40,10 +40,10 @@ namespace blink {
 
 class PLATFORM_EXPORT PlatformInstrumentation {
 public:
-    class LazyPixelRefTracker: TraceEvent::TraceScopedTrackableObject<void*> {
+    class LazyPixelRefTracker: base::trace_event::TraceScopedTrackableObject<void*> {
     public:
         LazyPixelRefTracker(void* instance)
-            : TraceEvent::TraceScopedTrackableObject<void*>(CategoryName, LazyPixelRef, instance)
+            : base::trace_event::TraceScopedTrackableObject<void*>(CategoryName, LazyPixelRef, instance)
         {
         }
     };