Bug 732951 - Propagate nsContentUtils::ASCIIToLower/ASCIIToUpper error. r=bz

content/events/src/nsDOMDataTransfer.cpp

@@ -337,7 +337,10 @@ nsDOMDataTransfer::GetData(const nsAString& aFormat, nsAString& aData)
     // for the URL type, parse out the first URI from the list. The URIs are
     // separated by newlines
     nsAutoString lowercaseFormat;
-    nsContentUtils::ASCIIToLower(aFormat, lowercaseFormat);
+    rv = nsContentUtils::ASCIIToLower(aFormat, lowercaseFormat);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
     
     if (lowercaseFormat.EqualsLiteral("url")) {
       PRInt32 lastidx = 0, idx;

content/html/content/src/nsGenericHTMLElement.cpp

@@ -352,8 +352,10 @@ nsGenericHTMLElement::SetAttribute(const nsAString& aName,
     nsCOMPtr<nsIAtom> nameAtom;
     if (IsInHTMLDocument()) {
       nsAutoString lower;
-      nsContentUtils::ASCIIToLower(aName, lower);
-      nameAtom = do_GetAtom(lower);
+      rv = nsContentUtils::ASCIIToLower(aName, lower);
+      if (NS_SUCCEEDED(rv)) {
+        nameAtom = do_GetAtom(lower);
+      }
     }
     else {
       nameAtom = do_GetAtom(aName);

content/html/content/src/nsHTMLCanvasElement.cpp

@@ -326,7 +326,10 @@ nsHTMLCanvasElement::ToDataURLImpl(const nsAString& aMimeType,
   }
 
   nsAutoString type;
-  nsContentUtils::ASCIIToLower(aMimeType, type);
+  nsresult rv = nsContentUtils::ASCIIToLower(aMimeType, type);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
 
   nsAutoString params;
 
@@ -367,8 +370,7 @@ nsHTMLCanvasElement::ToDataURLImpl(const nsAString& aMimeType,
   }
 
   nsCOMPtr<nsIInputStream> stream;
-  nsresult rv = ExtractData(type, params, getter_AddRefs(stream),
-                            fallbackToPNG);
+  rv = ExtractData(type, params, getter_AddRefs(stream), fallbackToPNG);
 
   // If there are unrecognized custom parse options, we should fall back to 
   // the default values for the encoder without any options at all.

content/html/document/src/nsHTMLContentSink.cpp

@@ -407,7 +407,10 @@ HTMLContentSink::AddAttributes(const nsIParserNode& aNode,
   nsAutoString key;
   for (; i != limit; i += step) {
     // Get lower-cased key
-    nsContentUtils::ASCIIToLower(aNode.GetKeyAt(i), key);
+    nsresult rv = nsContentUtils::ASCIIToLower(aNode.GetKeyAt(i), key);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
 
     nsCOMPtr<nsIAtom> keyAtom = do_GetAtom(key);