VM: Re-format to use at most one newline between functions

runtime/vm/virtual_memory.cc

Index: runtime/vm/virtual_memory.cc
diff --git a/runtime/vm/virtual_memory.cc b/runtime/vm/virtual_memory.cc
index 38bb4b3fd37b118208914a2ba21586b30df01ef0..facf4420944a765992af0d5ad7d1de00e33a9fda 100644
--- a/runtime/vm/virtual_memory.cc
+++ b/runtime/vm/virtual_memory.cc
@@ -14,7 +14,6 @@ bool VirtualMemory::InSamePage(uword address0, uword address1) {
           Utils::RoundDown(address1, PageSize()));
 }
 
-
 void VirtualMemory::Truncate(intptr_t new_size, bool try_unmap) {
   ASSERT((new_size & (PageSize() - 1)) == 0);
   ASSERT(new_size <= size());
@@ -27,7 +26,6 @@ void VirtualMemory::Truncate(intptr_t new_size, bool try_unmap) {
   region_.Subregion(region_, 0, new_size);
 }
 
-
 VirtualMemory* VirtualMemory::ForImagePage(void* pointer, uword size) {
   // Memory for precompilated instructions was allocated by the embedder, so
   // create a VirtualMemory without allocating.