Add a deoptimization count to each function to limit number of re-compilations.

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 10399)
+++ src/objects-inl.h	(working copy)
@@ -3520,7 +3520,7 @@
               kCompilerHintsOffset)
 SMI_ACCESSORS(SharedFunctionInfo, this_property_assignments_count,
               kThisPropertyAssignmentsCountOffset)
-SMI_ACCESSORS(SharedFunctionInfo, opt_count, kOptCountOffset)
+SMI_ACCESSORS(SharedFunctionInfo, deopt_count, kDeoptCountOffset)
 #else
 
 #define PSEUDO_SMI_ACCESSORS_LO(holder, name, offset)             \
@@ -3570,7 +3570,7 @@
 PSEUDO_SMI_ACCESSORS_LO(SharedFunctionInfo,
                         this_property_assignments_count,
                         kThisPropertyAssignmentsCountOffset)
-PSEUDO_SMI_ACCESSORS_HI(SharedFunctionInfo, opt_count, kOptCountOffset)
+PSEUDO_SMI_ACCESSORS_HI(SharedFunctionInfo, deopt_count, kDeoptCountOffset)
 #endif
 
 
@@ -3722,12 +3722,12 @@
 }
 
 
-Smi* SharedFunctionInfo::deopt_counter() {
+Smi* SharedFunctionInfo::stress_deopt_counter() {
   return reinterpret_cast<Smi*>(READ_FIELD(this, kDeoptCounterOffset));
 }
 
 
-void SharedFunctionInfo::set_deopt_counter(Smi* value) {
+void SharedFunctionInfo::set_stress_deopt_counter(Smi* value) {
   WRITE_FIELD(this, kDeoptCounterOffset, value);
 }