Inline the StackResource constructor/destructor.

vm/allocation.h

Index: vm/allocation.h
===================================================================
--- vm/allocation.h	(revision 6287)
+++ vm/allocation.h	(working copy)
@@ -6,6 +6,7 @@
 #define VM_ALLOCATION_H_
 
 #include "platform/assert.h"
+#include "vm/base_isolate.h"
 #include "vm/globals.h"
 
 namespace dart {
@@ -36,17 +37,36 @@
 // to a stack frame above the frame where these objects were allocated.
 class StackResource {
  public:
-  explicit StackResource(Isolate* isolate);
-  virtual ~StackResource();
+  explicit StackResource(BaseIsolate* isolate)
+      : isolate_(isolate), previous_(NULL) {
+    // We can only have longjumps and exceptions when there is a current
+    // isolate.  If there is no current isolate, we don't need to
+    // protect this case.
+    if (isolate) {
+      previous_ = isolate->top_resource();
+      isolate->set_top_resource(this);
+    }
+  }
 
-  Isolate* isolate() const { return isolate_; }
+  virtual ~StackResource() {
+    if (isolate()) {
+      StackResource* top = isolate()->top_resource();
+      ASSERT(top == this);
+      isolate()->set_top_resource(previous_);
+    }
+#if defined(DEBUG)
+    BaseIsolate::AssertCurrent(isolate());
+#endif
+  }
 
+  BaseIsolate* isolate() const { return isolate_; }
+
   // The delete operator should be private instead of public, but unfortunately
   // the compiler complains when compiling the destructors for subclasses.
   void operator delete(void* pointer) { UNREACHABLE(); }
 
  private:
-  Isolate* isolate_;  // Current isolate for this stack resource.
+  BaseIsolate* isolate_;  // Current isolate for this stack resource.
   StackResource* previous_;
 
   void* operator new(uword size);