Bug 1345202 part 3: Add a few more required 'using' and #include statements in layout/svg. r=TYLin

Specifically:
 - SVGGeometryFrame.cpp has several uses the type SVGGeometryElement which is
   really mozilla::dom::SVGGeometryElement. So I'm adding a 'using' decl for
   the 'mozilla::dom' namespace (and I'm dropping a now-unnecessary explicit
   dom:: prefix from another type there).
 - SVGImageContext.cpp calls several functions on nsIFrame (PresContext() &
   StyleSVG() at least). So I'm adding an #include for nsIFrame.h.
 - nsSVGMarkerFrame.cpp uses the type SVGGeometryFrame, which is really
   mozilla::SVGGeometryFrame. So I'm adding a 'using' decl for
   the 'mozilla' namespace.

MozReview-Commit-ID: AlCrocHhPtr

--HG--
extra : rebase_source : 8fe64f35179954813c00188587e0d7724f17791c

layout/svg/SVGGeometryFrame.cpp

@@ -30,6 +30,7 @@
 #include "SVGGraphicsElement.h"
 
 using namespace mozilla;
+using namespace mozilla::dom;
 using namespace mozilla::gfx;
 using namespace mozilla::image;
 
@@ -707,7 +708,7 @@ SVGGeometryFrame::GetCanvasTM()
   NS_ASSERTION(GetParent(), "null parent");
 
   nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
-  dom::SVGGraphicsElement *content = static_cast<dom::SVGGraphicsElement*>(mContent);
+  SVGGraphicsElement *content = static_cast<SVGGraphicsElement*>(mContent);
 
   return content->PrependLocalTransformsTo(parent->GetCanvasTM());
 }

layout/svg/SVGImageContext.cpp

@@ -10,6 +10,7 @@
 // Keep others in (case-insensitive) order:
 #include "gfxUtils.h"
 #include "mozilla/Preferences.h"
+#include "nsIFrame.h"
 #include "nsPresContext.h"
 
 namespace mozilla {