Move phase_zone from CompilationInfo to CompilationPhase.

src/lithium-allocator.h

Index: src/lithium-allocator.h
diff --git a/src/lithium-allocator.h b/src/lithium-allocator.h
index ce9101d17663a2aa598d97e58a2151c7cf048a04..3f1ce90eb8006e0c313b8199de90580d6a456a14 100644
--- a/src/lithium-allocator.h
+++ b/src/lithium-allocator.h
@@ -648,7 +648,7 @@ class LAllocator BASE_EMBEDDED {
 class LAllocatorPhase : public CompilationPhase {
  public:
   LAllocatorPhase(const char* name, LAllocator* allocator)
-      : CompilationPhase(name, allocator->isolate(), allocator->zone()),
+      : CompilationPhase(name, allocator->graph()->info()),
         allocator_(allocator) { }
   ~LAllocatorPhase();