Various extension-related cleanup and simplifications.

test/cctest/profiler-extension.cc

Index: test/cctest/profiler-extension.cc
diff --git a/test/cctest/profiler-extension.cc b/test/cctest/profiler-extension.cc
index 193b1ce24c3b561cc342e7ca49563e2d89a24c7c..80d9f904124493030433ac14eefc58e1910b73ca 100644
--- a/test/cctest/profiler-extension.cc
+++ b/test/cctest/profiler-extension.cc
@@ -28,8 +28,11 @@
 // Tests of profiles generator and utilities.
 
 #include "profiler-extension.h"
+#include "checks.h"
+
+namespace v8 {
+namespace internal {
 
-#include "cctest.h"
 
 const v8::CpuProfile* ProfilerExtension::last_profile = NULL;
 const char* ProfilerExtension::kSource =
@@ -69,6 +72,4 @@ void ProfilerExtension::StopProfiling(
       : v8::String::Empty(args.GetIsolate()));
 }
 
-
-static ProfilerExtension kProfilerExtension;
-v8::DeclareExtension kProfilerExtensionDeclaration(&kProfilerExtension);
+} }  // namespace v8::internal