[Fuchsia] Give VMOs names

runtime/vm/virtual_memory.h

Index: runtime/vm/virtual_memory.h
diff --git a/runtime/vm/virtual_memory.h b/runtime/vm/virtual_memory.h
index 92b8581ec8060942fb8c7637cd2d0f64545e8c27..8ce51cabdc585ea605c49ebb00f8a4f2106f13f1 100644
--- a/runtime/vm/virtual_memory.h
+++ b/runtime/vm/virtual_memory.h
@@ -35,9 +35,11 @@ class VirtualMemory {
   bool Contains(uword addr) const { return region_.Contains(addr); }
 
   // Commits the virtual memory area, which is guaranteed to be zeroed. Returns
-  // true on success and false on failure (e.g., out-of-memory).
-  bool Commit(bool is_executable) {
-    return Commit(start(), size(), is_executable);
+  // true on success and false on failure (e.g., out-of-memory). The name
+  // parameter is optional. On systems that support it, it is used to give the
+  // OS a name for the committed memory region.
+  bool Commit(bool is_executable, const char* name) {
+    return Commit(start(), size(), is_executable, name);
   }
 
   // Changes the protection of the virtual memory area.
@@ -61,8 +63,10 @@ class VirtualMemory {
   // upon destruction.
   void Truncate(intptr_t new_size, bool try_unmap = true);
 
-  // Commit a reserved memory area, so that the memory can be accessed.
-  bool Commit(uword addr, intptr_t size, bool is_executable);
+  // Commit a reserved memory area, so that the memory can be accessed. The name
+  // parameter is optional. On systems that support it, it is used to give the
+  // OS a name for the committed memory region.
+  bool Commit(uword addr, intptr_t size, bool is_executable, const char* name);
 
   bool vm_owns_region() const { return vm_owns_region_; }