Make RenderObject::style() return a const object

Source/core/css/resolver/FontBuilder.cpp

Index: Source/core/css/resolver/FontBuilder.cpp
diff --git a/Source/core/css/resolver/FontBuilder.cpp b/Source/core/css/resolver/FontBuilder.cpp
index 6a8d79507f5a6897da59b24e203711b892539068..6b6972f158ff107f2a4b9f072927152561072394 100644
--- a/Source/core/css/resolver/FontBuilder.cpp
+++ b/Source/core/css/resolver/FontBuilder.cpp
@@ -295,7 +295,7 @@ static void getFontAndGlyphOrientation(const RenderStyle* style, FontOrientation
     }
 }
 
-void FontBuilder::checkForOrientationChange(RenderStyle* style)
+void FontBuilder::checkForOrientationChange(const RenderStyle* style)
 {
     FontOrientation fontOrientation;
     NonCJKGlyphOrientation glyphOrientation;
@@ -310,7 +310,7 @@ void FontBuilder::checkForOrientationChange(RenderStyle* style)
     m_fontDescription.setOrientation(fontOrientation);
 }
 
-void FontBuilder::checkForGenericFamilyChange(RenderStyle* style, const RenderStyle* parentStyle)
+void FontBuilder::checkForGenericFamilyChange(const RenderStyle* style, const RenderStyle* parentStyle)
 {
     FontDescriptionChangeScope scope(this);
 
@@ -347,13 +347,13 @@ void FontBuilder::checkForGenericFamilyChange(RenderStyle* style, const RenderSt
     updateComputedSize(m_fontDescription, style);
 }
 
-void FontBuilder::updateComputedSize(RenderStyle* style, const RenderStyle* parentStyle)
+void FontBuilder::updateComputedSize(const RenderStyle* style, const RenderStyle* parentStyle)
 {
     FontDescriptionChangeScope scope(this);
     updateComputedSize(m_fontDescription, style);
 }
 
-void FontBuilder::updateComputedSize(FontDescription& fontDescription, RenderStyle* style)
+void FontBuilder::updateComputedSize(FontDescription& fontDescription, const RenderStyle* style)
 {
     float computedSize = getComputedSizeFromSpecifiedSize(fontDescription, style->effectiveZoom(), fontDescription.specifiedSize());
     float multiplier = style->textAutosizingMultiplier();