[iwyu] Include handles.h less.

These headers only need forward declarations.

BUG=v8:5294

Review-Url: https://codereview.chromium.org/2654253002
Cr-Commit-Position: refs/heads/master@{#42740}

src/accessors.h

@@ -8,7 +8,6 @@
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/globals.h"
-#include "src/handles.h"
 #include "src/property-details.h"
 
 namespace v8 {
@@ -16,6 +15,8 @@ namespace internal {
 
 // Forward declarations.
 class AccessorInfo;
+template <typename T>
+class Handle;
 
 // The list of accessor descriptors. This is a second-order macro
 // taking a macro to be applied to all accessor descriptor names.

src/api-experimental.h

@@ -5,11 +5,11 @@
 #ifndef V8_API_EXPERIMENTAL_H_
 #define V8_API_EXPERIMENTAL_H_
 
-#include "src/handles.h"
-
 namespace v8 {
 namespace internal {
 class Code;
+template <typename T>
+class MaybeHandle;
 }  // internal;
 namespace experimental {
 class FastAccessorBuilder;

src/builtins/builtins.h

@@ -6,11 +6,15 @@
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
-#include "src/handles.h"
+#include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+class Isolate;
+
 #define CODE_AGE_LIST_WITH_ARG(V, A) \
   V(Quadragenarian, A)               \
   V(Quinquagenarian, A)              \

src/compilation-cache.h

@@ -6,12 +6,14 @@
 #define V8_COMPILATION_CACHE_H_
 
 #include "src/allocation.h"
-#include "src/handles.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+
 // The compilation cache consists of several generational sub-caches which uses
 // this class as a base class. A sub-cache contains a compilation cache tables
 // for each generation of the sub-cache. Since the same source code string has

src/conversions.cc

@@ -15,6 +15,7 @@
 #include "src/conversions-inl.h"
 #include "src/dtoa.h"
 #include "src/factory.h"
+#include "src/handles.h"
 #include "src/list-inl.h"
 #include "src/strtod.h"
 #include "src/utils.h"

src/conversions.h

@@ -8,12 +8,13 @@
 #include <limits>
 
 #include "src/base/logging.h"
-#include "src/handles.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
 class UnicodeCache;
 
 // Maximum number of significant digits in decimal representation.

src/execution.h

@@ -7,12 +7,14 @@
 
 #include "src/allocation.h"
 #include "src/base/atomicops.h"
-#include "src/handles.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+
 class Execution final : public AllStatic {
  public:
   // Whether to report pending messages, or keep them pending on the isolate.

src/fast-accessor-assembler.h

@@ -11,7 +11,7 @@
 
 #include "include/v8-experimental.h"
 #include "src/base/macros.h"
-#include "src/handles.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
@@ -19,7 +19,8 @@ namespace internal {
 class Code;
 class CodeStubAssembler;
 class Isolate;
-class Zone;
+template <typename T>
+class MaybeHandle;
 
 namespace compiler {
 class Node;

src/field-type.h

@@ -6,13 +6,15 @@
 #define V8_FIELD_TYPE_H_
 
 #include "src/ast/ast-types.h"
-#include "src/handles.h"
 #include "src/objects.h"
 #include "src/ostreams.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+
 class FieldType : public Object {
  public:
   static FieldType* None();

src/futex-emulation.h

@@ -13,7 +13,6 @@
 #include "src/base/macros.h"
 #include "src/base/platform/condition-variable.h"
 #include "src/base/platform/mutex.h"
-#include "src/handles.h"
 
 // Support for emulating futexes, a low-level synchronization primitive. They
 // are natively supported by Linux, but must be emulated for other platforms.
@@ -31,6 +30,8 @@ class TimeDelta;
 
 namespace internal {
 
+template <typename T>
+class Handle;
 class Isolate;
 class JSArrayBuffer;
 

src/i18n.h

@@ -6,7 +6,6 @@
 #ifndef V8_I18N_H_
 #define V8_I18N_H_
 
-#include "src/handles.h"
 #include "src/objects.h"
 #include "unicode/uversion.h"
 
@@ -20,6 +19,9 @@ class SimpleDateFormat;
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+
 class DateFormat {
  public:
   // Create a formatter for the specificied locale and options. Returns the

src/interpreter/handler-table-builder.h

@@ -5,7 +5,6 @@
 #ifndef V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_
 #define V8_INTERPRETER_HANDLER_TABLE_BUILDER_H_
 
-#include "src/handles.h"
 #include "src/interpreter/bytecode-register.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/zone/zone-containers.h"
@@ -13,6 +12,8 @@
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
 class HandlerTable;
 class Isolate;
 

src/objects/scope-info.h

@@ -6,7 +6,6 @@
 #define V8_OBJECTS_SCOPE_INFO_H_
 
 #include "src/globals.h"
-#include "src/handles.h"
 #include "src/objects.h"
 #include "src/utils.h"
 
@@ -16,7 +15,11 @@
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
 class Isolate;
+template <typename T>
+class MaybeHandle;
 class Scope;
 class Zone;
 

src/parsing/func-name-inferrer.h

@@ -5,7 +5,6 @@
 #ifndef V8_PARSING_FUNC_NAME_INFERRER_H_
 #define V8_PARSING_FUNC_NAME_INFERRER_H_
 
-#include "src/handles.h"
 #include "src/zone/zone.h"
 
 namespace v8 {

src/parsing/scanner-character-streams.h

@@ -6,13 +6,15 @@
 #define V8_PARSING_SCANNER_CHARACTER_STREAMS_H_
 
 #include "include/v8.h"  // for v8::ScriptCompiler
-#include "src/handles.h"
 
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
 class Utf16CharacterStream;
 class RuntimeCallStats;
+class String;
 
 class ScannerStream {
  public:

src/regexp/jsregexp-inl.h

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

src/source-position-table.h

@@ -8,7 +8,6 @@
 #include "src/assert-scope.h"
 #include "src/checks.h"
 #include "src/globals.h"
-#include "src/handles.h"
 #include "src/source-position.h"
 #include "src/zone/zone-containers.h"
 
@@ -18,6 +17,8 @@ namespace internal {
 class AbstractCode;
 class BytecodeArray;
 class ByteArray;
+template <typename T>
+class Handle;
 class Isolate;
 class Zone;
 

test/cctest/heap/heap-tester.h

@@ -5,7 +5,6 @@
 #ifndef HEAP_HEAP_TESTER_H_
 #define HEAP_HEAP_TESTER_H_
 
-#include "src/handles.h"
 #include "src/heap/spaces.h"
 
 // Tests that should have access to private methods of {v8::internal::Heap}.
@@ -56,6 +55,9 @@
 namespace v8 {
 namespace internal {
 
+template <typename T>
+class Handle;
+
 class HeapTester {
  public:
 #define DECLARE_STATIC(Name) static void Test##Name();

test/common/wasm/wasm-module-runner.h

@@ -5,7 +5,6 @@
 #ifndef V8_WASM_MODULE_RUNNER_H_
 #define V8_WASM_MODULE_RUNNER_H_
 
-#include "src/handles.h"
 #include "src/isolate.h"
 #include "src/objects.h"
 #include "src/wasm/wasm-interpreter.h"
@@ -16,6 +15,10 @@
 
 namespace v8 {
 namespace internal {
+
+template <typename T>
+class Handle;
+
 namespace wasm {
 namespace testing {