Merge 91803 - Float32Array(ArrayBuffer, index, length) constructor working incorrectly.

LayoutTests/fast/canvas/webgl/array-unit-tests.html

Index: LayoutTests/fast/canvas/webgl/array-unit-tests.html
===================================================================
--- LayoutTests/fast/canvas/webgl/array-unit-tests.html	(revision 91888)
+++ LayoutTests/fast/canvas/webgl/array-unit-tests.html	(working copy)
@@ -480,7 +480,11 @@
     shouldThrowIndexSizeErr(function() {
         var buffer = new ArrayBuffer(4);
         var array = new type(buffer, 4, 0x3FFFFFFF);
-    }, "Construction of " + name + " with out-of-range values");
+    }, "Construction of " + name + " with out-of-range number of elements");
+    shouldThrowIndexSizeErr(function() {
+        var buffer = new ArrayBuffer(4);
+        var array = new type(buffer, 8);
+    }, "Construction of " + name + " with out-of-range offset");
 }
 
 function testConstructionWithNegativeOutOfRangeValues(type, name) {
@@ -545,6 +549,21 @@
     }
 }
 
+function testConstructionWithSubPortionOfArrayBuffer(type, name, elementSizeInBytes) {
+    if (elementSizeInBytes > 1) {
+        // Test construction with a valid sub-portion of an array buffer
+        // (whose size is not an integral multiple of the element size).
+        var size = 4 * elementSizeInBytes + (elementSizeInBytes / 2);
+        var buf = new ArrayBuffer(size);
+        try {
+            var array = new type(buf, 0, 2);
+            testPassed("new " + name + "(new ArrayBuffer(" + size + "), 0, 2) succeeded");
+        } catch (e) {
+            testFailed("new " + name + "(new ArrayBuffer(" + size + "), 0, 2) failed: " + e);
+        }
+    }
+}
+
 // These need to be global for shouldBe to see them
 var array;
 var typeSize;
@@ -849,6 +868,7 @@
     testConstructionWithUnalignedLength(type, name, testCase.elementSizeInBytes);
     testConstructionOfHugeArray(type, name, testCase.elementSizeInBytes);
     testConstructionWithBothArrayBufferAndLength(type, name, testCase.elementSizeInBytes);
+    testConstructionWithSubPortionOfArrayBuffer(type, name, testCase.elementSizeInBytes);
     testSubarrayWithOutOfRangeValues(type, name, testCase.elementSizeInBytes);
     testSubarrayWithDefaultValues(type, name, testCase.elementSizeInBytes);
     testSettingFromArrayWithOutOfRangeOffset(type, name);