Implement ImageData constructors.

LayoutTests/fast/canvas/canvas-ImageData-constructor-expected.txt

Index: LayoutTests/fast/canvas/canvas-ImageData-constructor-expected.txt
diff --git a/LayoutTests/fast/canvas/canvas-ImageData-constructor-expected.txt b/LayoutTests/fast/canvas/canvas-ImageData-constructor-expected.txt
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+Test ImageData constructor
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS ImageData is defined.
+PASS ImageData.length is 2
+PASS imageData is non-null.
+PASS imageData.data is non-null.
+PASS imageData.width is 100
+PASS imageData.height is 50
+PASS getRGBA(imageData.data, 4) is [0, 0, 0, 0]
+PASS getRGBA(imageData.data, 4) is testColor
+PASS new ImageData(10) threw exception TypeError: Failed to construct 'ImageData': 2 arguments required, but only 1 present..
+PASS new ImageData(0, 10) threw exception IndexSizeError: Failed to construct 'ImageData': The source width is zero or not a number..
+PASS new ImageData(10, 0) threw exception IndexSizeError: Failed to construct 'ImageData': The source height is zero or not a number..
+PASS new ImageData('width', 'height') threw exception IndexSizeError: Failed to construct 'ImageData': The source width is zero or not a number..
+PASS new ImageData(1 << 31, 1 << 31) threw exception IndexSizeError: Failed to construct 'ImageData': The requested image size exceeds the supported range..
+PASS new ImageData(new Uint8ClampedArray(0)) threw exception TypeError: Failed to construct 'ImageData': 2 arguments required, but only 1 present..
+PASS new ImageData(new Uint8Array(100), 25) threw exception IndexSizeError: Failed to construct 'ImageData': The source width is zero or not a number..
+PASS new ImageData(new Uint8ClampedArray(27), 2) threw exception IndexSizeError: Failed to construct 'ImageData': The input data byte length is not a multiple of 4..
+PASS new ImageData(new Uint8ClampedArray(104), 14) threw exception IndexSizeError: Failed to construct 'ImageData': The input data byte length is not a multiple of (4 * width)..
+PASS new ImageData(imageData.data, 0) threw exception IndexSizeError: Failed to construct 'ImageData': The source width is zero or not a number..
+PASS new ImageData(imageData.data, 13) threw exception IndexSizeError: Failed to construct 'ImageData': The input data byte length is not a multiple of (4 * width)..
+PASS new ImageData(imageData.data, 1 << 31) threw exception IndexSizeError: Failed to construct 'ImageData': The input data byte length is not a multiple of (4 * width)..
+PASS new ImageData(imageData.data, 'biggish') threw exception IndexSizeError: Failed to construct 'ImageData': The source width is zero or not a number..
+PASS new ImageData(imageData.data, 1 << 24, 1 << 31) threw exception IndexSizeError: Failed to construct 'ImageData': The input data byte length is not a multiple of (4 * width)..
+PASS imageDataFromData.width is 100
+PASS imageDataFromData.height is 50
+PASS imageDataFromData.data is imageData.data
+PASS getRGBA(imageDataFromData.data, 10) is getRGBA(imageData.data, 10)
+PASS getRGBA(imageDataFromData.data, 10) is getRGBA(imageData.data, 10)
+PASS imageDataFromData.width is 20
+PASS imageDataFromData.height is 5
+PASS imageDataFromData.data is data
+PASS getRGBA(imageDataFromData.data, 2) is getRGBA(data, 2)
+PASS getRGBA(imageDataFromData.data, 2) is getRGBA(data, 2)
+PASS successfullyParsed is true
+
+TEST COMPLETE
+