Sanitizing source files in Skia_Periodic_House_Keeping
Encode images with DCTDecode (JPEG) in PDFs if it makes sense. Fallback to FlateDecode (zip) if it makes sense. Otherewise include uncompressed stream.
This change will reduce the size of PDFs to 50% (in the case of the existing SKPs, we reduce the total size of PDFs from 105MB to 50MB) 
Review URL: https://codereview.appspot.com/7068055
Fix compile warning on mac that breaks a bot, and remove jpeg creation bitmap since we mock the compression.
Fix a bug in SkTextBox.

When checking to see if the line of text is beyond the bottom of
the textbox, compare with the bottom, rather than the height (bottom
- top). Prior to this change, text in the bottom of a textbox could
be clipped out.

BUG=https://code.google.com/p/skia/issues/detail?id=1250

Review URL: https://codereview.chromium.org/13856017
Fixing numerical rounding edge case in SkTileGrid

BUG=https://code.google.com/p/chromium/issues/detail?id=234688
TEST=TileGrid skia unit test

Review URL: https://codereview.chromium.org/13860011