[Isolates] Merge r 6300:6500 from bleeding_edge to isolates.

src/frames.cc

Index: src/frames.cc
===================================================================
--- src/frames.cc	(revision 6955)
+++ src/frames.cc	(working copy)
@@ -562,6 +562,12 @@
     parameters_base += safepoint_entry.argument_count();
   }
 
+  // Skip saved double registers.
+  if (safepoint_entry.has_doubles()) {
+    parameters_base += DoubleRegister::kNumAllocatableRegisters *
+        kDoubleSize / kPointerSize;
+  }
+
   // Visit the registers that contain pointers if any.
   if (safepoint_entry.HasRegisters()) {
     for (int i = kNumSafepointRegisters - 1; i >=0; i--) {