Bug 1754277: Fix non-unified build errors in layout/svg, and mark it as safe to build in non-unified mode. r=emilio

Below are the build errors fixed here.

layout/svg/SVGFEUnstyledLeafFrame.cpp:75:33: error: no type named 'SVGFEUnstyledElement' in namespace 'mozilla::dom'

* Fixed this by including SVGFilters.h (which defines this type).

layout/svg/SVGFEContainerFrame.cpp:83:12: error: unknown type name 'SVGFE'; did you mean 'dom::SVGFE'?
layout/svg/SVGFELeafFrame.cpp:80:12: error: unknown type name 'SVGFE'; did you mean 'dom::SVGFE'?

* Fixed these with a 'using' statement for the namespace.

layout/svg/SVGGFrame.cpp:34:32: error: unknown type name 'SVGElement'

* Fixed by including this type's header.

layout/svg/FilterInstance.cpp:873:9: error: use of undeclared identifier 'nsLayoutUtils'
layout/svg/SVGOuterSVGFrame.cpp:623:29: error: incomplete type 'nsLayoutUtils' named in nested name specifier
layout/svg/SVGUseFrame.cpp:84:5: error: use of undeclared identifier 'nsLayoutUtils
layout/svg/SVGViewportFrame.cpp:207:9: error: use of undeclared identifier 'nsLayoutUtils'

* Fixed these by including this header.

layout/svg/SVGOuterSVGFrame.cpp:88:20: error: unused function 'DependsOnIntrinsicSize' [-Werror,-Wunused-function]

* Fixed by removing the unused function.

layout/svg/SVGStopFrame.cpp:86:21: error: unknown type name 'SVGGradientFrame'

* Fixed this by including this header.

Differential Revision: https://phabricator.services.mozilla.com/D138187

layout/svg/FilterInstance.cpp

@@ -29,6 +29,7 @@
 #include "mozilla/SVGFilterInstance.h"
 #include "mozilla/SVGUtils.h"
 #include "mozilla/dom/Document.h"
+#include "nsLayoutUtils.h"
 #include "CSSFilterInstance.h"
 #include "SVGIntegrationUtils.h"
 

layout/svg/SVGFEContainerFrame.cpp

@@ -13,6 +13,8 @@
 #include "nsIFrame.h"
 #include "nsLiteralString.h"
 
+using namespace mozilla::dom;
+
 nsIFrame* NS_NewSVGFEContainerFrame(mozilla::PresShell* aPresShell,
                                     mozilla::ComputedStyle* aStyle);
 

layout/svg/SVGFELeafFrame.cpp

@@ -13,6 +13,8 @@
 #include "nsIFrame.h"
 #include "nsGkAtoms.h"
 
+using namespace mozilla::dom;
+
 nsIFrame* NS_NewSVGFELeafFrame(mozilla::PresShell* aPresShell,
                                mozilla::ComputedStyle* aStyle);
 namespace mozilla {

layout/svg/SVGFEUnstyledLeafFrame.cpp

@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // Keep in (case-insensitive) order:
+#include "mozilla/dom/SVGFilters.h"
 #include "mozilla/PresShell.h"
 #include "mozilla/SVGObserverUtils.h"
 #include "nsContainerFrame.h"

layout/svg/SVGGFrame.cpp

@@ -8,6 +8,7 @@
 #include "SVGGFrame.h"
 
 // Keep others in (case-insensitive) order:
+#include "mozilla/dom/SVGElement.h"
 #include "mozilla/PresShell.h"
 #include "nsGkAtoms.h"
 #include "nsIFrame.h"

layout/svg/SVGOuterSVGFrame.cpp

@@ -11,6 +11,7 @@
 #include "gfxContext.h"
 #include "nsDisplayList.h"
 #include "nsIInterfaceRequestorUtils.h"
+#include "nsLayoutUtils.h"
 #include "nsObjectLoadingContent.h"
 #include "nsSubDocumentFrame.h"
 #include "mozilla/PresShell.h"
@@ -83,16 +84,6 @@ SVGOuterSVGFrame::SVGOuterSVGFrame(ComputedStyle* aStyle,
   AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
 }
 
-// helper
-static inline bool DependsOnIntrinsicSize(const nsIFrame* aEmbeddingFrame) {
-  const nsStylePosition* pos = aEmbeddingFrame->StylePosition();
-
-  // XXX it would be nice to know if the size of aEmbeddingFrame's containing
-  // block depends on aEmbeddingFrame, then we'd know if we can return false
-  // for eStyleUnit_Percent too.
-  return !pos->mWidth.ConvertsToLength() || !pos->mHeight.ConvertsToLength();
-}
-
 // The CSS Containment spec says that size-contained replaced elements must be
 // treated as having an intrinsic width and height of 0.  That's applicable to
 // outer SVG frames, unless they're the outermost element (in which case

layout/svg/SVGStopFrame.cpp

@@ -10,6 +10,7 @@
 #include "nsGkAtoms.h"
 #include "mozilla/ComputedStyle.h"
 #include "mozilla/PresShell.h"
+#include "mozilla/SVGGradientFrame.h"
 #include "mozilla/SVGObserverUtils.h"
 
 // This is a very simple frame whose only purpose is to capture style change

layout/svg/SVGUseFrame.cpp

@@ -11,6 +11,7 @@
 #include "mozilla/SVGUtils.h"
 #include "mozilla/dom/MutationEvent.h"
 #include "mozilla/dom/SVGUseElement.h"
+#include "nsLayoutUtils.h"
 
 using namespace mozilla::dom;
 

layout/svg/SVGViewportFrame.cpp

@@ -10,11 +10,11 @@
 // Keep others in (case-insensitive) order:
 #include "gfx2DGlue.h"
 #include "gfxContext.h"
-#include "nsIFrame.h"
 #include "mozilla/ISVGDisplayableFrame.h"
 #include "mozilla/SVGContainerFrame.h"
 #include "mozilla/SVGUtils.h"
 #include "mozilla/dom/SVGViewportElement.h"
+#include "nsLayoutUtils.h"
 
 using namespace mozilla::dom;
 using namespace mozilla::gfx;

layout/svg/moz.build

@@ -94,5 +94,3 @@ LOCAL_INCLUDES += [
 RESOURCE_FILES += [
     "svg.css",
 ]
-
-REQUIRES_UNIFIED_BUILD = True