[Isolates] Merge 6500:6700 from bleeding_edge to isolates.

src/top.cc

Index: src/top.cc
===================================================================
--- src/top.cc	(revision 7006)
+++ src/top.cc	(working copy)
@@ -620,7 +620,7 @@
 }
 
 
-bool Isolate::ShouldReturnException(bool* is_caught_externally,
+bool Isolate::ShouldReportException(bool* is_caught_externally,
                                     bool catchable_by_javascript) {
   // Find the top-most try-catch handler.
   StackHandler* handler =
@@ -662,15 +662,15 @@
   Handle<Object> exception_handle(exception_object);
 
   // Determine reporting and whether the exception is caught externally.
-  bool is_caught_externally = false;
   bool is_out_of_memory = exception == Failure::OutOfMemoryException();
   bool is_termination_exception = exception == heap_.termination_exception();
   bool catchable_by_javascript = !is_termination_exception && !is_out_of_memory;
   // Only real objects can be caught by JS.
   ASSERT(!catchable_by_javascript || is_object);
-  bool should_return_exception =
-      ShouldReturnException(&is_caught_externally, catchable_by_javascript);
-  bool report_exception = catchable_by_javascript && should_return_exception;
+  bool is_caught_externally = false;
+  bool should_report_exception =
+      ShouldReportException(&is_caught_externally, catchable_by_javascript);
+  bool report_exception = catchable_by_javascript && should_report_exception;
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // Notify debugger of exception.