Allow supporting older PICTURE_VERSIONs.

Allow supporting 1 older PICTURE_VERSION.

Allows https://codereview.chromium.org/14230022/ to be submitted
without breaking bench_pictures and render_pictures.

After DEPS roll and SKP capture, this will be reverted.

Committed: https://code.google.com/p/skia/source/detail?r=8918

[scroggo, 2013-04-29 18:50:41]

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer.cpp
File src/core/SkOrderedReadBuffer.cpp (right):

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:180: if (10 == fPictureVersion) {
codereview makes this unobvious, but the only change in this function is that it
now does:

if (10 == fPictureVersion) {
  // readBitmap before https://codereview.chromium.org/14230022/
} else {
  // readBitmap as in https://codereview.chromium.org/14230022/
}

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:191: // This bitmap was encoded when written,
but we are unable to decode, possibly due to
100 chars

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:194: "Could not decode bitmap. Resulting bitmap
will be red.");
100 chars

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:224: // The bitmap was stored in a heap, but
there is no way to access it. Set an error and
100 chars

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:241: // This bitmap was encoded when written,
but we are unable to decode, possibly due to
100 chars

https://codereview.chromium.org/14158015/diff/1/src/core/SkOrderedReadBuffer....
src/core/SkOrderedReadBuffer.cpp:244: "Could not decode bitmap. Resulting bitmap
will be red.");
100 chars

[scroggo, 2013-04-29 19:00:40]

https://codereview.chromium.org/14158015/diff/1/src/core/SkPicture.cpp
File src/core/SkPicture.cpp (right):

https://codereview.chromium.org/14158015/diff/1/src/core/SkPicture.cpp#newcod...
src/core/SkPicture.cpp:290: if (info.fVersion < 10 || info.fVersion >
PICTURE_VERSION) {
This needs to be duplicated in QT/SkDebuggerGUI.cpp in order to play back the
older skp files.

[scroggo, 2013-04-29 20:51:20]

As requested, this CL goes on top of https://codereview.chromium.org/14230022/
so that we can avoid making the bots go red.

Plan:
Submit https://codereview.chromium.org/14230022/
Submit this CL
Roll into Chrome
Capture SKPs
Revert this CL

[scroggo, 2013-04-30 02:38:59]

Committed patchset #1 manually as r8918 (presubmit successful).