Reland: Debugger: deduplicate shared function info when setting script break points.

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/debug.h"
@@ skipping 2628 matching lines @@
   DebugScope debug_scope(isolate->debug());
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result,
       Execution::Call(isolate, function, handle(function->global_proxy()), 0,
                       NULL));
   return *result;
 }
 
 
+RUNTIME_FUNCTION(Runtime_GetDebugContext) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 0);
+  Handle<Context> context = isolate->debug()->GetDebugContext();
+  context->set_security_token(isolate->native_context()->security_token());
+  return context->global_proxy();
+}
+
+
 // Performs a GC.
 // Presently, it only does a full GC.
 RUNTIME_FUNCTION(Runtime_CollectGarbage) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, "%CollectGarbage");
   return isolate->heap()->undefined_value();
 }
 
 
@@ skipping 128 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }
 }  // namespace v8::internal