Don't apply pointer multipler to heap sizes on Android.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 0b353b70f1d269a79b747f65cedc23fc0d487958..943a30fc7abb03313e082a357da4014e545b0e54 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1086,7 +1086,13 @@ class Heap {
 
   static const int kInitalOldGenerationLimitFactor = 2;
 
+#if V8_OS_ANDROID
+  // Don't apply pointer multiplier on Android since it has no swap space and
+  // should instead adapt it's heap size based on available physical memory.
+  static const int kPointerMultiplier = 1;
+#else
   static const int kPointerMultiplier = i::kPointerSize / 4;
+#endif
 
   // The new space size has to be a power of 2. Sizes are in MB.
   static const int kMaxSemiSpaceSizeLowMemoryDevice = 1 * kPointerMultiplier;