Refactor IsolateHolder to be able to always create the isolate

gin/array_buffer.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GIN_ARRAY_BUFFER_H_
 #define GIN_ARRAY_BUFFER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "gin/converter.h"
 #include "gin/gin_export.h"
 #include "v8/include/v8.h"
 
 namespace gin {
 
 class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
  public:
   virtual void* Allocate(size_t length) OVERRIDE;
   virtual void* AllocateUninitialized(size_t length) OVERRIDE;
   virtual void Free(void* data, size_t length) OVERRIDE;
 
-  static ArrayBufferAllocator* SharedInstance();
+  GIN_EXPORT static ArrayBufferAllocator* SharedInstance();
 };
 
 class GIN_EXPORT ArrayBuffer {
  public:
   ArrayBuffer();
   ArrayBuffer(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
   ~ArrayBuffer();
   ArrayBuffer& operator=(const ArrayBuffer& other);
 
   void* bytes() const { return bytes_; }
@@ skipping 37 matching lines @@
 
 template<>
 struct GIN_EXPORT Converter<ArrayBufferView> {
   static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val,
                      ArrayBufferView* out);
 };
 
 }  // namespace gin
 
 #endif  // GIN_ARRAY_BUFFER_H_