Add drawImage() originClean() getSecurityOrigin() to OffscreenCanvas

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl

Index: third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl
diff --git a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl
index 755300f081f03c0a18774d2c4fd25f108e549191..d6458d5920947da988d4cd5f01c54e466ac09604 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl
+++ b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.idl
@@ -16,7 +16,7 @@
     attribute (DOMString or CanvasGradient or CanvasPattern) fillStyle; // (default black)
     CanvasGradient createLinearGradient(double x0, double y0, double x1, double y1);
     [RaisesException] CanvasGradient createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1);
-    [CallWith=ScriptState, RaisesException, Exposed=Worker] CanvasPattern? createPattern(CanvasImageSource image, [TreatNullAs=NullString] DOMString repetitionType);
+    [CallWith=ExecutionContext, RaisesException, Exposed=Worker] CanvasPattern? createPattern(CanvasImageSource image, [TreatNullAs=NullString] DOMString repetitionType);
 
     // CanvasRect interface
     void clearRect(unrestricted double x, unrestricted double y, unrestricted double width, unrestricted double height);
@@ -30,6 +30,12 @@
     void stroke();
     void stroke(Path2D path);
 
+    // drawing images
+    // TODO: Expose these API to Window with more layout tests

[Justin Novosad, 2016/04/29 19:29:04]

crbug?

+    [CallWith=ExecutionContext, Exposed=Worker, RaisesException] void drawImage(CanvasImageSource image, unrestricted double x, unrestricted double y);
+    [CallWith=ExecutionContext, Exposed=Worker, RaisesException] void drawImage(CanvasImageSource image, unrestricted double x, unrestricted double y, unrestricted double width, unrestricted double height);
+    [CallWith=ExecutionContext, Exposed=Worker, RaisesException] void drawImage(CanvasImageSource image, unrestricted double sx, unrestricted double sy, unrestricted double sw, unrestricted double sh, unrestricted double dx, unrestricted double dy, unrestricted double dw, unrestricted double dh);

[Justin Novosad, 2016/04/29 19:29:04]

Since you are exposing these new APIs, please add new layout tests under
fast/canvas that exercise the various overloads of OCRC2D.drawImage.  

+
     // Line caps/joins
     attribute unrestricted double lineWidth; // (default 1)
     attribute DOMString lineCap; // "butt", "round", "square" (default "butt")