[Chromium] Remove old getFontFamilyForCharacters() and familyForChars() APIs.

[Chromium] Remove old getFontFamilyForCharacters() and familyForChars() APIs.
https://bugs.webkit.org/show_bug.cgi?id=72844

Source/WebCore:

Respects bold and italic properties that is given by fontconfig.

Reviewed by Darin Fisher.

* platform/graphics/chromium/FontCacheLinux.cpp:
(WebCore::FontCache::getFontDataForCharacters): Removed #if and old logic.

Source/WebKit/chromium:

Removes old APIs for getting font family for given characters.

Reviewed by Darin Fisher.

* public/linux/WebFontInfo.h: Removed old familyForChars().
* public/linux/WebSandboxSupport.h: Removed old getFontFamilyForCharacters() and changed new getFontFamilyForCharacters() to be a pure virtual function.
* src/linux/WebFontInfo.cpp: Removes old familyForChars().

LayoutTests:

Font selection mechanism of Chromium Linux port has been improved. Rebaselines affected tests.

Reviewed by Darin Fisher.

* platform/chromium-linux/fast/text/cg-fallback-bolding-expected.png:
* platform/chromium-linux/fast/text/cg-fallback-bolding-expected.txt:
* platform/chromium-linux/fast/text/international/khmer-selection-expected.png:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@100886 268f45cc-cd09-0410-ab3c-d52691b4dbfc