Revert of Disallow users modify canvas after it transfers control to offscreen

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index ef72bebdf0a1ea54dd5949843575781ef1f9e3f7..2e58bec4cd36bf80e7f4042a0613b8a186f9b851 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -174,36 +174,14 @@
     return HTMLElement::insertedInto(node);
 }
 
-void HTMLCanvasElement::setHeight(int value, ExceptionState& exceptionState)
-{
-    if (surfaceLayerBridge()) {
-        // The existence of surfaceLayerBridge indicates that
-        // canvas.transferControlToOffscreen has been called.
-        exceptionState.throwDOMException(InvalidStateError, "Resizing is not allowed for a canvas that has transferred its control to offscreen.");
-        return;
-    }
+void HTMLCanvasElement::setHeight(int value)
+{
     setIntegralAttribute(heightAttr, value);
 }
 
-void HTMLCanvasElement::setWidth(int value, ExceptionState& exceptionState)
-{
-    if (surfaceLayerBridge()) {
-        // Same comment as above.
-        exceptionState.throwDOMException(InvalidStateError, "Resizing is not allowed for a canvas that has transferred its control to offscreen.");
-        return;
-    }
+void HTMLCanvasElement::setWidth(int value)
+{
     setIntegralAttribute(widthAttr, value);
-}
-
-void HTMLCanvasElement::setSize(const IntSize& newSize)
-{
-    if (newSize == size())
-        return;
-    m_ignoreReset = true;
-    setIntegralAttribute(widthAttr, newSize.width());
-    setIntegralAttribute(heightAttr, newSize.height());
-    m_ignoreReset = false;
-    reset();
 }
 
 HTMLCanvasElement::ContextFactoryVector& HTMLCanvasElement::renderingContextFactories()
@@ -662,9 +640,6 @@
 
 String HTMLCanvasElement::toDataURL(const String& mimeType, const ScriptValue& qualityArgument, ExceptionState& exceptionState) const
 {
-    if (surfaceLayerBridge()) {
-        exceptionState.throwDOMException(InvalidStateError, "canvas.toDataURL is not allowed for a canvas that has transferred its control to offscreen.");
-    }
     if (!originClean()) {
         exceptionState.throwSecurityError("Tainted canvases may not be exported.");
         return String();
@@ -711,10 +686,6 @@
 
 void HTMLCanvasElement::toBlob(BlobCallback* callback, const String& mimeType, const ScriptValue& qualityArgument, ExceptionState& exceptionState)
 {
-    if (surfaceLayerBridge()) {
-        exceptionState.throwDOMException(InvalidStateError, "canvas.toBlob is not allowed for a canvas that has transferred its control to offscreen.");
-    }
-
     if (!originClean()) {
         exceptionState.throwSecurityError("Tainted canvases may not be exported.");
         return;
@@ -1049,8 +1020,8 @@
 void HTMLCanvasElement::createImageBufferUsingSurfaceForTesting(std::unique_ptr<ImageBufferSurface> surface)
 {
     discardImageBuffer();
-    setIntegralAttribute(widthAttr, surface->size().width());
-    setIntegralAttribute(heightAttr, surface->size().height());
+    setWidth(surface->size().width());
+    setHeight(surface->size().height());
     createImageBufferInternal(std::move(surface));
 }