Remove the dependency of Zone on Isolate

src/compiler/linkage-impl.h

 // 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.
 
 #ifndef V8_COMPILER_LINKAGE_IMPL_H_
 #define V8_COMPILER_LINKAGE_IMPL_H_
 
 #include "src/code-stubs.h"
 #include "src/compiler/osr.h"
 
@@ skipping 116 matching lines @@
         js_parameter_count,               // js_parameter_count
         properties,                       // properties
         kNoCalleeSaved,                   // callee-saved
         flags,                            // flags
         function->name);                  // debug name
   }
 
 
   // TODO(turbofan): cache call descriptors for code stub calls.
   static CallDescriptor* GetStubCallDescriptor(
-      Zone* zone, const CallInterfaceDescriptor& descriptor,
+      Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
       int stack_parameter_count, CallDescriptor::Flags flags,
       Operator::Properties properties) {
     const int register_parameter_count =
         descriptor.GetEnvironmentParameterCount();
     const int js_parameter_count =
         register_parameter_count + stack_parameter_count;
     const int context_count = 1;
     const size_t return_count = 1;
     const size_t parameter_count =
         static_cast<size_t>(js_parameter_count + context_count);
@@ skipping 28 matching lines @@
     return new (zone) CallDescriptor(     // --
         CallDescriptor::kCallCodeObject,  // kind
         target_type,                      // target MachineType
         target_loc,                       // target location
         types.Build(),                    // machine_sig
         locations.Build(),                // location_sig
         js_parameter_count,               // js_parameter_count
         properties,                       // properties
         kNoCalleeSaved,                   // callee-saved registers
         flags,                            // flags
-        descriptor.DebugName(zone->isolate()));
+        descriptor.DebugName(isolate));
   }
 
   static CallDescriptor* GetSimplifiedCDescriptor(Zone* zone,
                                                   MachineSignature* msig) {
     LocationSignature::Builder locations(zone, msig->return_count(),
                                          msig->parameter_count());
     // Add return location(s).
     AddReturnLocations(&locations);
 
     // Add register and/or stack parameter(s).
@@ skipping 50 matching lines @@
     return incoming_->GetInputLocation(parameter_index);
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_IMPL_H_