[wasm] Increase WebAssembly.Memory maximum size to ~2GB

test/mjsunit/wasm/import-memory.js

Index: test/mjsunit/wasm/import-memory.js
diff --git a/test/mjsunit/wasm/import-memory.js b/test/mjsunit/wasm/import-memory.js
index 178febdff471472d6bace5c9c935efdcd0416f33..b5dd620546798b1c60a5ec55c49907f2132523ab 100644
--- a/test/mjsunit/wasm/import-memory.js
+++ b/test/mjsunit/wasm/import-memory.js
@@ -149,6 +149,7 @@ load("test/mjsunit/wasm/wasm-module-builder.js");
 
 (function TestGrowMemoryZeroInitialMemory() {
   print("ZeroInitialMemory");
+  let kV8MaxPages = 32767;
   let memory = new WebAssembly.Memory({initial: 0});
   assertEquals(0, memory.buffer.byteLength);
   let i32 = new Int32Array(memory.buffer);
@@ -176,7 +177,7 @@ load("test/mjsunit/wasm/wasm-module-builder.js");
   for (offset = 5 * kPageSize; offset < 5 * kPageSize + 4; offset++) {
     assertThrows(load);
   }
-  assertThrows(() => memory.grow(16381));
+  assertThrows(() => memory.grow(kV8MaxPages - 3));

[Eric Holk, 2017/06/13 22:37:20]

So the -3 is because the previous for loop grew by one page four times and we
want to grow to one page beyond the limit, right?

[gdeepti, 2017/06/13 22:47:07]

Yep, that's right. 

 })();
 
 (function ImportedMemoryBufferLength() {