Simplify/cleanup {postApply,apply}Resource signatures

Source/core/rendering/svg/RenderSVGResource.h

Index: Source/core/rendering/svg/RenderSVGResource.h
diff --git a/Source/core/rendering/svg/RenderSVGResource.h b/Source/core/rendering/svg/RenderSVGResource.h
index 3923fe5e5a36409222624420e673cf6b1d502f4c..653594a52fa51652bbe464983f148cf775b445eb 100644
--- a/Source/core/rendering/svg/RenderSVGResource.h
+++ b/Source/core/rendering/svg/RenderSVGResource.h
@@ -54,8 +54,8 @@ public:
     virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
     virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) = 0;
 
-    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode);
-    virtual void postApplyResource(RenderObject*, GraphicsContext*&) { }
+    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*, RenderSVGResourceModeFlags);

[f(malita), 2014/10/06 14:21:41]

We can make this pure virtual and drop the stub impl (RenderSVGResource is
abstract already).

[fs, 2014/10/06 14:34:48]

No - not yet at least - since we still have Clipper/Masker/etc. in this
hierarchy, and hence they need something non-abstract. Ditto for the post*
(which I'm ~3 CLs away from removing though...)

+    virtual void postApplyResource(GraphicsContext*) { }

[f(malita), 2014/10/06 14:21:41]

For symmetry, we can also make this pure virtual (only
RenderSVGResourceSolidColor doesn't override IINM).

 
     virtual RenderSVGResourceType resourceType() const = 0;