Disentangle assembler from isolate.

src/x87/assembler-x87.cc

Index: src/x87/assembler-x87.cc
diff --git a/src/x87/assembler-x87.cc b/src/x87/assembler-x87.cc
index 7daf83d9fbbaa807cd819c81d8079c39ddd9fde6..08dade2a434e8ef368e74bf7c92cf1d6ef575c6e 100644
--- a/src/x87/assembler-x87.cc
+++ b/src/x87/assembler-x87.cc
@@ -122,18 +122,18 @@ uint32_t RelocInfo::wasm_function_table_size_reference() {
 }
 
 void RelocInfo::unchecked_update_wasm_memory_reference(
-    Address address, ICacheFlushMode icache_flush_mode) {
+    Isolate* isolate, Address address, ICacheFlushMode icache_flush_mode) {
   Memory::Address_at(pc_) = address;
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
-    Assembler::FlushICache(isolate_, pc_, sizeof(Address));
+    Assembler::FlushICache(isolate, pc_, sizeof(Address));
   }
 }
 
-void RelocInfo::unchecked_update_wasm_size(uint32_t size,
+void RelocInfo::unchecked_update_wasm_size(Isolate* isolate, uint32_t size,
                                            ICacheFlushMode icache_flush_mode) {
   Memory::uint32_at(pc_) = size;
   if (icache_flush_mode != SKIP_ICACHE_FLUSH) {
-    Assembler::FlushICache(isolate_, pc_, sizeof(uint32_t));
+    Assembler::FlushICache(isolate, pc_, sizeof(uint32_t));
   }
 }
 
@@ -221,8 +221,8 @@ Register Operand::reg() const {
 #define EMIT(x)                                 \
   *pc_++ = (x)
 
-Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
-    : AssemblerBase(isolate, buffer, buffer_size) {
+Assembler::Assembler(IsolateData isolate_data, void* buffer, int buffer_size)
+    : AssemblerBase(isolate_data, buffer, buffer_size) {
 // Clear the buffer in debug mode unless it was provided by the
 // caller in which case we can't be sure it's okay to overwrite
 // existing code in it; see CodePatcher::CodePatcher(...).