Separate CompilationInfo into its own file.

test/cctest/compiler/test-loop-assignment-analysis.cc

 // 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.
 
 #include "src/ast/scopes.h"
-#include "src/compiler.h"
+#include "src/compilation-info.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/parsing/parse-info.h"
 #include "src/parsing/parser.h"
 #include "src/parsing/rewriter.h"
 #include "test/cctest/cctest.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 276 matching lines @@
 
   f.CheckLoopAssignedCount(1, "x");
   f.CheckLoopAssignedCount(3, "y");
   f.CheckLoopAssignedCount(5, "z");
   f.CheckLoopAssignedCount(0, "w");
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8