[heap] Remove max executable size configuration.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index 2cc173cf37bd938f0b12bc59b3379c52b0cd8976..1fcd0843264e2b1ad3126d76f77b9007d7e71a11 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -4881,7 +4881,14 @@ void Assembler::GrowBuffer() {
   } else {
     desc.buffer_size = buffer_size_ + 1*MB;
   }
-  CHECK_GT(desc.buffer_size, 0);  // no overflow
+
+  // Some internal data structures overflow for very large buffers,
+  // they must ensure that kMaximalBufferSize is not too large.
+  if (desc.buffer_size > kMaximalBufferSize ||
+      static_cast<size_t>(desc.buffer_size) >
+          isolate_data().max_old_generation_size_) {
+    V8::FatalProcessOutOfMemory("Assembler::GrowBuffer");
+  }
 
   // Set up new buffer.
   desc.buffer = NewArray<byte>(desc.buffer_size);