Adding cache for security origin validations in 2D/WebGL canvases

Source/core/html/canvas/WebGLRenderingContextBase.cpp

Index: Source/core/html/canvas/WebGLRenderingContextBase.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContextBase.cpp b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
index 44257b1cd9224d4839c5782592c8ff55309c4cb9..3304a1793ecf0fb248830bf931eff1ff01deb763 100644
--- a/Source/core/html/canvas/WebGLRenderingContextBase.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
@@ -5221,7 +5221,8 @@ bool WebGLRenderingContextBase::validateHTMLImageElement(const char* functionNam
         synthesizeGLError(GL_INVALID_VALUE, functionName, "invalid image");
         return false;
     }
-    if (image->wouldTaintOrigin(canvas()->securityOrigin())) {
+
+    if (wouldTaintOrigin(image)) {
         exceptionState.throwSecurityError("The cross-origin image at " + url.elidedString() + " may not be loaded.");
         return false;
     }
@@ -5234,7 +5235,7 @@ bool WebGLRenderingContextBase::validateHTMLCanvasElement(const char* functionNa
         synthesizeGLError(GL_INVALID_VALUE, functionName, "no canvas");
         return false;
     }
-    if (canvas->wouldTaintOrigin(this->canvas()->securityOrigin())) {
+    if (wouldTaintOrigin(canvas)) {
         exceptionState.throwSecurityError("Tainted canvases may not be loaded.");
         return false;
     }
@@ -5247,7 +5248,8 @@ bool WebGLRenderingContextBase::validateHTMLVideoElement(const char* functionNam
         synthesizeGLError(GL_INVALID_VALUE, functionName, "no video");
         return false;
     }
-    if (video->wouldTaintOrigin(canvas()->securityOrigin())) {
+
+    if (wouldTaintOrigin(video)) {
         exceptionState.throwSecurityError("The video element contains cross-origin data, and may not be loaded.");
         return false;
     }