changes to image container creation to facilitate different container types. Needed for ART support, and cleaner GIF and JPEG support. r=pavlov, sr=hyatt

modules/libpr0n/decoders/gif/nsGIFDecoder2.cpp

@@ -69,7 +69,10 @@ NS_IMETHODIMP nsGIFDecoder2::Init(imgIRequest *aRequest)
   mImageRequest = aRequest;
   mObserver = do_QueryInterface(aRequest);  // we're holding 2 strong refs to the request.
 
-  aRequest->GetImage(getter_AddRefs(mImageContainer));
+  mImageContainer = do_CreateInstance("@mozilla.org/image/container;1");
+  aRequest->SetImage(mImageContainer);
+  
+  mImageContainer->StartAnimation();
 
   /* do gif init stuff */
   /* Always decode to 24 bit pixdepth */

modules/libpr0n/decoders/jpeg/nsJPEGDecoder.cpp

@@ -122,7 +122,8 @@ NS_IMETHODIMP nsJPEGDecoder::Init(imgIRequest *aRequest)
   mRequest = aRequest;
   mObserver = do_QueryInterface(mRequest);
 
-  aRequest->GetImage(getter_AddRefs(mImage));
+  mImage = do_CreateInstance("@mozilla.org/image/container;1");
+  aRequest->SetImage(mImage);
 
   /* We set up the normal JPEG error routines, then override error_exit. */
   mInfo.err = jpeg_std_error(&mErr.pub);

modules/libpr0n/decoders/png/nsPNGDecoder.cpp

@@ -76,7 +76,8 @@ NS_IMETHODIMP nsPNGDecoder::Init(imgIRequest *aRequest)
   mRequest = aRequest;
   mObserver = do_QueryInterface(aRequest);  // we're holding 2 strong refs to the request.
 
-  aRequest->GetImage(getter_AddRefs(mImage));
+  mImage = do_CreateInstance("@mozilla.org/image/container;1");
+  aRequest->SetImage(mImage);
 
   /* do png init stuff */
 

modules/libpr0n/decoders/ppm/nsPPMDecoder.cpp

@@ -62,7 +62,8 @@ NS_IMETHODIMP nsPPMDecoder::Init(imgIRequest *aRequest)
 
   mObserver = do_QueryInterface(aRequest);  // we're holding 2 strong refs to the request.
 
-  aRequest->GetImage(getter_AddRefs(mImage));
+  mImage = do_CreateInstance("@mozilla.org/image/container;1");
+  aRequest->SetImage(mImage);
 
   mFrame = do_CreateInstance("@mozilla.org/gfx/image/frame;2");
   if (!mFrame)