[iwyu] Include heap.h less.

The biggest problem is isolate.h (this CL doesn't solve that yet).

BUG=v8:5294

Change-Id: I56b32109f501c48facd99cd12ca6c8f427e188a9
Reviewed-on: https://chromium-review.googlesource.com/471487Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44613}

src/contexts-inl.h

@@ -6,6 +6,7 @@
 #define V8_CONTEXTS_INL_H_
 
 #include "src/contexts.h"
+#include "src/heap/heap.h"
 #include "src/objects-inl.h"
 #include "src/objects/dictionary.h"
 #include "src/objects/regexp-match-info.h"

src/contexts.h

@@ -5,7 +5,6 @@
 #ifndef V8_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
-#include "src/heap/heap.h"
 #include "src/objects.h"
 
 namespace v8 {

src/debug/debug-evaluate.h

@@ -7,6 +7,7 @@
 
 #include "src/frames.h"
 #include "src/objects.h"
+#include "src/objects/string-table.h"
 
 namespace v8 {
 namespace internal {

src/elements.h

@@ -6,7 +6,6 @@
 #define V8_ELEMENTS_H_
 
 #include "src/elements-kind.h"
-#include "src/heap/heap.h"
 #include "src/isolate.h"
 #include "src/keys.h"
 #include "src/objects.h"

src/frames.h

@@ -6,12 +6,18 @@
 #define V8_FRAMES_H_
 
 #include "src/allocation.h"
+#include "src/flags.h"
 #include "src/handles.h"
+#include "src/objects.h"
 #include "src/safepoint-table.h"
 
 namespace v8 {
 namespace internal {
 
+class AbstractCode;
+class ObjectVisitor;
+class StringStream;
+
 #if V8_TARGET_ARCH_ARM64
 typedef uint64_t RegList;
 #else

src/handles-inl.h

@@ -7,7 +7,6 @@
 
 #include "src/api.h"
 #include "src/handles.h"
-#include "src/heap/heap.h"
 #include "src/isolate.h"
 
 namespace v8 {

src/objects/dictionary.h

@@ -5,7 +5,7 @@
 #ifndef V8_OBJECTS_DICTIONARY_H_
 #define V8_OBJECTS_DICTIONARY_H_
 
-#include "src/objects.h"
+#include "src/objects/hash-table.h"
 
 // Has to be the last include (doesn't have include guards):
 #include "src/objects/object-macros.h"

src/regexp/jsregexp-inl.h

@@ -7,7 +7,6 @@
 #define V8_REGEXP_JSREGEXP_INL_H_
 
 #include "src/allocation.h"
-#include "src/heap/heap.h"
 #include "src/objects.h"
 #include "src/regexp/jsregexp.h"
 

src/safepoint-table.h

@@ -6,7 +6,8 @@
 #define V8_SAFEPOINT_TABLE_H_
 
 #include "src/allocation.h"
-#include "src/heap/heap.h"
+#include "src/assert-scope.h"
+#include "src/utils.h"
 #include "src/v8memory.h"
 #include "src/zone/zone.h"
 

src/transitions.h

@@ -7,7 +7,6 @@
 
 #include "src/checks.h"
 #include "src/elements-kind.h"
-#include "src/heap/heap.h"
 #include "src/isolate.h"
 #include "src/objects.h"
 #include "src/objects/descriptor-array.h"