[assembler] Remove unnecessary cast.

BUG=

Review-Url: https://codereview.chromium.org/2751993002
Cr-Commit-Position: refs/heads/master@{#43845}

src/arm/assembler-arm-inl.h

@@ -219,9 +219,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   Memory::Address_at(pc_ + Assembler::kPatchDebugBreakSlotAddressOffset) =
       target;
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/arm64/assembler-arm64-inl.h

@@ -813,9 +813,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   STATIC_ASSERT(Assembler::kPatchDebugBreakSlotAddressOffset == 0);
   Assembler::set_target_address_at(isolate_, pc_, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/ia32/assembler-ia32-inl.h

@@ -226,9 +226,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   Address location = pc_ + Assembler::kPatchDebugBreakSlotAddressOffset;
   Assembler::set_target_address_at(isolate_, location, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/mips/assembler-mips-inl.h

@@ -335,9 +335,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   // sequence.
   Assembler::set_target_address_at(isolate_, pc_, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/mips64/assembler-mips64-inl.h

@@ -319,9 +319,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   // sequence.
   Assembler::set_target_address_at(isolate_, pc_, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/ppc/assembler-ppc-inl.h

@@ -297,9 +297,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence());
   Assembler::set_target_address_at(isolate_, pc_, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/s390/assembler-s390-inl.h

@@ -274,9 +274,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence());
   Assembler::set_target_address_at(isolate_, pc_, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/x64/assembler-x64-inl.h

@@ -514,9 +514,9 @@ void RelocInfo::set_debug_call_address(Address target) {
                          pc_ + Assembler::kPatchDebugBreakSlotAddressOffset,
                          sizeof(Address));
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }
 

src/x87/assembler-x87-inl.h

@@ -232,9 +232,9 @@ void RelocInfo::set_debug_call_address(Address target) {
   Address location = pc_ + Assembler::kPatchDebugBreakSlotAddressOffset;
   Assembler::set_target_address_at(isolate_, location, host_, target);
   if (host() != NULL) {
-    Object* target_code = Code::GetCodeFromTargetAddress(target);
-    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
-        host(), this, HeapObject::cast(target_code));
+    Code* target_code = Code::GetCodeFromTargetAddress(target);
+    host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this,
+                                                                  target_code);
   }
 }