Replace SkPicture(SkStream) constructors with a factory.

SkPicture:
Remove the constructors which take an SkStream as an argument. Rather
than having to check a variable for success, the factory will return
NULL on failure.
Add a protected function for determining if an SkStream is an SKP
to share code with SkTimedPicture.
In the factory, check for a NULL SkStream.
Use a default decoder (from BUG:
https://code.google.com/p/skia/issues/detail?id=1325)

SkDebuggerGUI:
Call SkPicture::CreateFromStream when necessary.
Write a factory for creating SkTimedPictures and use it.

Use the factory throughout tools.

Add include/lazy to utils and effects gyp include_dirs so SkPicture.h
can reference SkImageDecoder.h which references SkBitmapFactory.h (in
include/lazy).

Changes code Chromium uses, so this will require a temporary Skia
and then a change to Chromium to use the new Skia code.

TODO: Create a decoder that does nothing to be used by pinspect,
lua pictures, etc, and allow it to not assert in SkOrderedReadBuffer.

R=reed@google.com

Review URL: https://codereview.chromium.org/17113004

git-svn-id: http://skia.googlecode.com/svn/trunk@9822 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 380511f..3825197 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1379,8 +1379,10 @@
 
             SkAutoDataUnref data(ostream.copyToData());
             SkMemoryStream istream(data->data(), data->size());
-            SkPicture pict(&istream);
-            orig->drawPicture(pict);
+            SkAutoTUnref<SkPicture> pict(SkPicture::CreateFromStream(&istream));
+            if (pict.get() != NULL) {
+                orig->drawPicture(*pict.get());
+            }
         } else {
             fPicture->draw(orig);
             fPicture->unref();