import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1184996 (Part 1) - Create decoders with a DecoderFactory. r=tn (dacf21ed2)
- Bug 1184996 (Part 2) - Clean up RasterImage's decoding API. r=tn (c127af0b3)
- Bug 1184996 (Part 3) - Replace all remaining references to 'size decodes' with 'metadata decodes'. r=tn (3744e5df4)
- Bug 1184996 (Part 4) - Forbid instantiation of decoders except via DecoderFactory. r=tn (588d56d84)
- No bug - Remove extra printf left over from bug 1127618. r=smaug (b02f7bfe1)
- Bug 1187386 (Part 1) - Make most decoder state private. r=tn (328dbc605)
- Bug 1187386 (Part 2) - Rework decoder code to avoid calling Decode::GetImage(). r=tn (9a94096f9)
- Bug 1187386 (Part 3) - Don't destroy Decoder::mImage if Decoder::mImage is null. r=tn (cbb6738cd)
- Bug 1187386 (Part 4) - Make imgFrame::SetOptimizable() callable from off-main-thread. r=tn (f03478b28)
- Bug 1187386 (Part 5) - Merge Decoder::SetSizeOnImage() into ImageMetadata::SetOnImage(). r=tn (8afb5d4a3)
- Bug 1033090 - Truncate a large URI in the user message about it. r=seth (7bd4b447b)
- Bug 1187386 (Part 6) - Merge Decoder::Finish() and RasterImage::OnDecodingComplete() into RasterImage::FinalizeDecoder(). r=tn (f342dd5db)
- Bug 1181863 (Part 1) - Add support for reading from nsIInputStreams directly to SourceBuffer. r=tn (74748dad9)
- Bug 1181863 (Part 2) - Add ImageOps::DecodeToSurface() to allow image decoding without involving any main-thread-only objects. r=tn (25b86eb50)
- Bug 1181863 (Part 3) - Add tests for DecodeToSurface(). r=tn (9506eb2f6)
-  Bug 1181863 - Part 4: Fix the build bustage (aee05bdc9)
- Bug 1187546 - Make it possible to ask image decoders to only decode the first frame. r=tn (1beeeefb6)
- Bug 1191100 - Remove XPIDL signature comments in .cpp files. r=ehsan (ee75fe3b5)

docshell/base/nsDefaultURIFixup.cpp

@@ -47,7 +47,6 @@ nsDefaultURIFixup::~nsDefaultURIFixup()
 {
 }
 
-/* nsIURI createExposableURI (in nsIURI aURI); */
 NS_IMETHODIMP
 nsDefaultURIFixup::CreateExposableURI(nsIURI* aURI, nsIURI** aReturn)
 {
@@ -111,7 +110,6 @@ nsDefaultURIFixup::CreateExposableURI(nsIURI* aURI, nsIURI** aReturn)
   return NS_OK;
 }
 
-/* nsIURI createFixupURI (in nsAUTF8String aURIText, in unsigned long aFixupFlags); */
 NS_IMETHODIMP
 nsDefaultURIFixup::CreateFixupURI(const nsACString& aStringURI,
                                   uint32_t aFixupFlags,

docshell/base/nsDocShell.cpp

@@ -1886,7 +1886,6 @@ nsDocShell::GetChromeEventHandler(nsIDOMEventTarget** aChromeEventHandler)
   return NS_OK;
 }
 
-/* void setCurrentURI (in nsIURI uri); */
 NS_IMETHODIMP
 nsDocShell::SetCurrentURI(nsIURI* aURI)
 {
@@ -7179,7 +7178,6 @@ nsDocShell::Embed(nsIContentViewer* aContentViewer,
   return NS_OK;
 }
 
-/* void setIsPrinting (in boolean aIsPrinting); */
 NS_IMETHODIMP
 nsDocShell::SetIsPrinting(bool aIsPrinting)
 {
@@ -13001,7 +12999,6 @@ nsDocShell::IsFrame()
   return !!parent;
 }
 
-/* boolean IsBeingDestroyed (); */
 NS_IMETHODIMP
 nsDocShell::IsBeingDestroyed(bool* aDoomed)
 {

docshell/base/nsDocShellEnumerator.cpp

@@ -23,7 +23,6 @@ nsDocShellEnumerator::~nsDocShellEnumerator()
 
 NS_IMPL_ISUPPORTS(nsDocShellEnumerator, nsISimpleEnumerator)
 
-/* nsISupports getNext (); */
 NS_IMETHODIMP
 nsDocShellEnumerator::GetNext(nsISupports** aResult)
 {
@@ -45,7 +44,6 @@ nsDocShellEnumerator::GetNext(nsISupports** aResult)
   return rv;
 }
 
-/* boolean hasMoreElements (); */
 NS_IMETHODIMP
 nsDocShellEnumerator::HasMoreElements(bool* aResult)
 {

docshell/base/nsDocShellLoadInfo.cpp

@@ -198,7 +198,6 @@ nsDocShellLoadInfo::SetPostDataStream(nsIInputStream* aStream)
   return NS_OK;
 }
 
-/* attribute nsIInputStream headersStream; */
 NS_IMETHODIMP
 nsDocShellLoadInfo::GetHeadersStream(nsIInputStream** aHeadersStream)
 {