[Chromium] Add HarfBuzzShaperBase class

[Chromium] Add HarfBuzzShaperBase class
https://bugs.webkit.org/show_bug.cgi?id=79336

Extract a part of ComplexTextControllerHarfBuzz class as
HarfBuzzShaperBase class. This patch intends to share the code between
old HarfBuzz and HarfBuzz-ng.

Reviewed by Tony Chang.

No new tests. No behavior change. Existing tests in fast/text should pass.

* PlatformBlackBerry.cmake: Added HarfBuzzShaperBase.cpp.
* WebCore.gyp/WebCore.gyp: Added HarfBuzzShaperBase.(cpp|h).
* WebCore.gypi: Ditto.
* platform/graphics/harfbuzz/ComplexTextControllerHarfBuzz.cpp:
(WebCore::ComplexTextController::ComplexTextController): Removed redundant arguments.
(WebCore::ComplexTextController::nextScriptRun): Use m_normalizedBuffer and m_normalizedBufferLength instead of m_run.
(WebCore::ComplexTextController::setupFontForScriptRun): Ditto.
(WebCore::ComplexTextController::setGlyphPositions): Ditto.
* platform/graphics/harfbuzz/ComplexTextControllerHarfBuzz.h:
(ComplexTextController):
* platform/graphics/harfbuzz/FontHarfBuzz.cpp:
(WebCore::Font::drawComplexText): Removed redundant arguments of ComplexTextController constructor.
(WebCore::Font::floatWidthForComplexText): Ditto.
(WebCore::Font::offsetForPositionForComplexText): Ditto.
(WebCore::Font::selectionRectForComplexText): Ditto.
* platform/graphics/harfbuzz/HarfBuzzShaperBase.cpp: Added.
(WebCore):
(WebCore::HarfBuzzShaperBase::HarfBuzzShaperBase):
(WebCore::normalizeSpacesAndMirrorChars):
(WebCore::HarfBuzzShaperBase::setNormalizedBuffer):
(WebCore::HarfBuzzShaperBase::isWordEnd):
(WebCore::HarfBuzzShaperBase::determineWordBreakSpacing):
(WebCore::HarfBuzzShaperBase::setPadding):
* platform/graphics/harfbuzz/HarfBuzzShaperBase.h: Added.
(WebCore):
(HarfBuzzShaperBase):
(WebCore::HarfBuzzShaperBase::~HarfBuzzShaperBase):
(WebCore::HarfBuzzShaperBase::isCodepointSpace):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@108733 268f45cc-cd09-0410-ab3c-d52691b4dbfc