Isolate/Thread split: Isolate -> Zone for LocationSummary.

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
===================================================================
--- runtime/vm/flow_graph_compiler.cc	(revision 42919)
+++ runtime/vm/flow_graph_compiler.cc	(working copy)
@@ -1125,7 +1125,8 @@
 void FlowGraphCompiler::AllocateRegistersLocally(Instruction* instr) {
   ASSERT(!is_optimizing());
 
-  instr->InitializeLocationSummary(isolate(), false);  // Not optimizing.
+  instr->InitializeLocationSummary(isolate()->current_zone(),

[Ivan Posva, 2015/01/15 20:35:39]

In a lot of files we have added the following lines to get less visually
disturbing access to the isolate() field:
// Quick access to the locally defined isolate() method.
#define I (isolate())

[koda, 2015/01/15 21:29:11]

Done.

+                                   false);  // Not optimizing.
   LocationSummary* locs = instr->locs();
 
   bool blocked_registers[kNumberOfCpuRegisters];