Various extension-related cleanup and simplifications.

test/cctest/cctest.cc

Index: test/cctest/cctest.cc
diff --git a/test/cctest/cctest.cc b/test/cctest/cctest.cc
index 4aa9c7eb7126382ddc5da1e460a582ccd2e63c1f..865bc6d22a27504c42f8ec7c2ca46f9e54119238 100644
--- a/test/cctest/cctest.cc
+++ b/test/cctest/cctest.cc
@@ -27,6 +27,10 @@
 
 #include <v8.h>
 #include "cctest.h"
+
+#include "print-extension.h"
+#include "profiler-extension.h"
+#include "trace-extension.h"
 #include "debug.h"
 
 enum InitializationState {kUnset, kUnintialized, kInitialized};
@@ -141,6 +145,13 @@ int main(int argc, char* argv[]) {
   CcTestArrayBufferAllocator array_buffer_allocator;
   v8::V8::SetArrayBufferAllocator(&array_buffer_allocator);
 
+  i::PrintExtension print_extension;
+  v8::RegisterExtension(&print_extension);
+  i::ProfilerExtension profiler_extension;
+  v8::RegisterExtension(&profiler_extension);
+  i::TraceExtension trace_extension;
+  v8::RegisterExtension(&trace_extension);
+
   int tests_run = 0;
   bool print_run_count = true;
   for (int i = 1; i < argc; i++) {