Merge 201348 "Fix   fallback glyph lookup"

Merge 201348 "Fix   fallback glyph lookup"

> Fix   fallback glyph lookup
> 
> On Japanese locale Android which has Motoya Maruberi
> as the system default font (up until 5.1), the font
> fallback path mistakenly picked up ".notdef" glyph
> for   (U+00A0).
> 
> This happened because in the fallback path it still
> ended up in looking up non-existent glyph in the same
> font file and fell back to the "missingGlyphData".
> 
> This is because Blink looks up the glyph in
> normalized codepoint (for U+00A0, normalized to U+0020)
> but still it tries to look up the original codepoint.
> 
> This bug was exposed by the following change, to make
> not to normalize   to space before looking up glyph.
> https://codereview.chromium.org/705163003
> 
> BUG=454108
> 
> Review URL: https://codereview.chromium.org/1317833003

TBR=kochi@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201463

[kochi, 2015-08-31 04:52:26]

Committed patchset #1 (id:1) manually as r201463.