Various extension-related cleanup and simplifications.

test/cctest/trace-extension.h

Index: test/cctest/trace-extension.h
diff --git a/src/extensions/externalize-string-extension.h b/test/cctest/trace-extension.h
similarity index 69%
copy from src/extensions/externalize-string-extension.h
copy to test/cctest/trace-extension.h
index 3d1e438f7f2617b806ccf25ee96f4b6eb0729284..b80b3d45dc81579629ddccb6761cfa709b17e4e9 100644
--- a/src/extensions/externalize-string-extension.h
+++ b/test/cctest/trace-extension.h
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,27 +25,32 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_EXTENSIONS_EXTERNALIZE_STRING_EXTENSION_H_
-#define V8_EXTENSIONS_EXTERNALIZE_STRING_EXTENSION_H_
+#ifndef V8_TEST_CCTEST_TRACE_EXTENSION_H_
+#define V8_TEST_CCTEST_TRACE_EXTENSION_H_
 
 #include "v8.h"
 
 namespace v8 {
 namespace internal {
 
-class ExternalizeStringExtension : public v8::Extension {
+class TraceExtension : public v8::Extension {
  public:
-  ExternalizeStringExtension() : v8::Extension("v8/externalize", kSource) {}
+  TraceExtension() : v8::Extension("v8/trace", kSource) { }
   virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
       v8::Isolate* isolate,
       v8::Handle<v8::String> name);
-  static void Externalize(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static void IsAscii(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static void Register();
+  static void Trace(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void JSTrace(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void JSEntrySP(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void JSEntrySPLevel2(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static Address GetJsEntrySp();
+  static void InitTraceEnv(TickSample* sample);
+  static void DoTrace(Address fp);
  private:
-  static const char* const kSource;
+  static Address GetFP(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static const char* kSource;
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_EXTENSIONS_EXTERNALIZE_STRING_EXTENSION_H_
+#endif