Remove grab-bag includes of v8.h from everywhere.

src/layout-descriptor.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/layout-descriptor.h"
+
 #include <sstream>
 
-#include "src/v8.h"
-
 #include "src/base/bits.h"
-#include "src/layout-descriptor.h"
+#include "src/handles-inl.h"
 
 using v8::base::bits::CountTrailingZeros32;
 
 namespace v8 {
 namespace internal {
 
 Handle<LayoutDescriptor> LayoutDescriptor::New(
     Handle<Map> map, Handle<DescriptorArray> descriptors, int num_descriptors) {
   Isolate* isolate = descriptors->GetIsolate();
   if (!FLAG_unbox_double_fields) return handle(FastPointerLayout(), isolate);
@@ skipping 258 matching lines @@
       int n = capacity();
       for (int i = last_field_index; i < n; i++) {
         DCHECK(IsTagged(i));
       }
     }
   }
   return true;
 }
 }  // namespace internal
 }  // namespace v8