Switch HTMLCanvasElement over to new-style ExceptionState.

Source/core/html/canvas/WebGLRenderingContext.cpp

Index: Source/core/html/canvas/WebGLRenderingContext.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContext.cpp b/Source/core/html/canvas/WebGLRenderingContext.cpp
index 8414f04da664c3cf019c78651868296215a887b9..f07d13012ee573dd13cc7b07d97c9c5f8551efdc 100644
--- a/Source/core/html/canvas/WebGLRenderingContext.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContext.cpp
@@ -5146,7 +5146,7 @@ bool WebGLRenderingContext::validateHTMLImageElement(const char* functionName, H
         return false;
     }
     if (wouldTaintOrigin(image)) {
-        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "the cross-origin image at " + url.elidedString() + " may not be loaded."));
+        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "The cross-origin image at " + url.elidedString() + " may not be loaded."));
         return false;
     }
     return true;
@@ -5159,7 +5159,7 @@ bool WebGLRenderingContext::validateHTMLCanvasElement(const char* functionName,
         return false;
     }
     if (wouldTaintOrigin(canvas)) {
-        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "tainted canvases may not be loaded."));
+        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "Tainted canvases may not be loaded."));
         return false;
     }
     return true;
@@ -5172,7 +5172,7 @@ bool WebGLRenderingContext::validateHTMLVideoElement(const char* functionName, H
         return false;
     }
     if (wouldTaintOrigin(video)) {
-        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "the video element contains cross-origin data, and may not be loaded."));
+        exceptionState.throwSecurityError(ExceptionMessages::failedToExecute(functionName, "WebGLRenderingContext", "The video element contains cross-origin data, and may not be loaded."));
         return false;
     }
     return true;