Introduce a Gin class instead of using global functions to control gin

gin/runner_unittest.cc

Index: gin/runner_unittest.cc
diff --git a/gin/runner_unittest.cc b/gin/runner_unittest.cc
index adcebed4cbc94d297f8f695851fe25d0c8a76416..0a5b8f48b7e994e06065c416bd27c9dcab27913b 100644
--- a/gin/runner_unittest.cc
+++ b/gin/runner_unittest.cc
@@ -5,7 +5,9 @@
 #include "gin/runner.h"
 
 #include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
 #include "gin/converter.h"
+#include "gin/gin.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using v8::Isolate;
@@ -18,8 +20,10 @@ namespace gin {
 TEST(RunnerTest, Run) {
   std::string source = "this.result = 'PASS';\n";
 
+  scoped_ptr<gin::Gin> instance(new gin::Gin);

[abarth-chromium, 2013/11/19 15:49:21]

Why not allocate on the stack?

[jochen (gone - plz use gerrit), 2013/11/19 15:57:24]

Done.

+
   RunnerDelegate delegate;
-  Isolate* isolate = Isolate::GetCurrent();
+  Isolate* isolate = instance->isolate();
   Runner runner(&delegate, isolate);
   Runner::Scope scope(&runner);
   runner.Run(source);