Separate CompilationInfo into its own file.

src/compiler/code-generator.cc

Index: src/compiler/code-generator.cc
diff --git a/src/compiler/code-generator.cc b/src/compiler/code-generator.cc
index 4513c248fc8f886cbe22f2bac4700cc297f5d0ad..1800f8678a5e8951640534476f9b54160e5a4276 100644
--- a/src/compiler/code-generator.cc
+++ b/src/compiler/code-generator.cc
@@ -6,6 +6,7 @@
 
 #include "src/address-map.h"
 #include "src/base/adapters.h"
+#include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
@@ -63,6 +64,8 @@ CodeGenerator::CodeGenerator(Frame* frame, Linkage* linkage,
   CreateFrameAccessState(frame);
 }
 
+Isolate* CodeGenerator::isolate() const { return info_->isolate(); }
+
 void CodeGenerator::CreateFrameAccessState(Frame* frame) {
   FinishFrame(frame);
   frame_access_state_ = new (code()->zone()) FrameAccessState(frame);