Add missing .h files to .gn files that have a .cc file next to it in the gn file already.

third_party/WebKit/Source/core/svg/BUILD.gn

Index: third_party/WebKit/Source/core/svg/BUILD.gn
diff --git a/third_party/WebKit/Source/core/svg/BUILD.gn b/third_party/WebKit/Source/core/svg/BUILD.gn
index 9859b9b2384b73b7b60e3c9847fdc9f819d4e121..13835a5565e4780e630e76b39e12204d1fbc8537 100644
--- a/third_party/WebKit/Source/core/svg/BUILD.gn
+++ b/third_party/WebKit/Source/core/svg/BUILD.gn
@@ -23,7 +23,9 @@ blink_core_sources("svg") {
     "SVGAElement.cpp",
     "SVGAElement.h",
     "SVGAngle.cpp",
+    "SVGAngle.h",
     "SVGAngleTearOff.cpp",
+    "SVGAngleTearOff.h",
     "SVGAnimateElement.cpp",
     "SVGAnimateElement.h",
     "SVGAnimateMotionElement.cpp",
@@ -31,16 +33,25 @@ blink_core_sources("svg") {
     "SVGAnimateTransformElement.cpp",
     "SVGAnimateTransformElement.h",
     "SVGAnimatedAngle.cpp",
+    "SVGAnimatedAngle.h",
     "SVGAnimatedColor.cpp",
+    "SVGAnimatedColor.h",
     "SVGAnimatedEnumerationBase.cpp",
+    "SVGAnimatedEnumerationBase.h",
     "SVGAnimatedHref.cpp",
     "SVGAnimatedHref.h",
     "SVGAnimatedInteger.cpp",
+    "SVGAnimatedInteger.h",
     "SVGAnimatedIntegerOptionalInteger.cpp",
+    "SVGAnimatedIntegerOptionalInteger.h",
     "SVGAnimatedLength.cpp",
+    "SVGAnimatedLength.h",
     "SVGAnimatedNumber.cpp",
+    "SVGAnimatedNumber.h",
     "SVGAnimatedNumberOptionalNumber.cpp",
+    "SVGAnimatedNumberOptionalNumber.h",
     "SVGAnimatedPath.cpp",
+    "SVGAnimatedPath.h",
     "SVGAnimatedString.cpp",
     "SVGAnimatedString.h",
     "SVGAnimationElement.cpp",
@@ -60,6 +71,7 @@ blink_core_sources("svg") {
     "SVGDiscardElement.cpp",
     "SVGDiscardElement.h",
     "SVGDocumentExtensions.cpp",
+    "SVGDocumentExtensions.h",
     "SVGElement.cpp",
     "SVGElement.h",
     "SVGElementProxy.cpp",
@@ -69,6 +81,7 @@ blink_core_sources("svg") {
     "SVGEllipseElement.cpp",
     "SVGEllipseElement.h",
     "SVGEnumeration.cpp",
+    "SVGEnumeration.h",
     "SVGFEBlendElement.cpp",
     "SVGFEBlendElement.h",
     "SVGFEColorMatrixElement.cpp",
@@ -146,9 +159,13 @@ blink_core_sources("svg") {
     "SVGIntegerOptionalInteger.cpp",
     "SVGIntegerOptionalInteger.h",
     "SVGLength.cpp",
+    "SVGLength.h",
     "SVGLengthContext.cpp",
+    "SVGLengthContext.h",
     "SVGLengthList.cpp",
+    "SVGLengthList.h",
     "SVGLengthTearOff.cpp",
+    "SVGLengthTearOff.h",
     "SVGLineElement.cpp",
     "SVGLineElement.h",
     "SVGLinearGradientElement.cpp",
@@ -215,7 +232,9 @@ blink_core_sources("svg") {
     "SVGPolylineElement.cpp",
     "SVGPolylineElement.h",
     "SVGPreserveAspectRatio.cpp",
+    "SVGPreserveAspectRatio.h",
     "SVGPreserveAspectRatioTearOff.cpp",
+    "SVGPreserveAspectRatioTearOff.h",
     "SVGRadialGradientElement.cpp",
     "SVGRadialGradientElement.h",
     "SVGRect.cpp",
@@ -262,11 +281,15 @@ blink_core_sources("svg") {
     "SVGTitleElement.cpp",
     "SVGTitleElement.h",
     "SVGTransform.cpp",
+    "SVGTransform.h",
     "SVGTransformDistance.cpp",
     "SVGTransformDistance.h",
     "SVGTransformList.cpp",
+    "SVGTransformList.h",
     "SVGTransformListTearOff.cpp",
+    "SVGTransformListTearOff.h",
     "SVGTransformTearOff.cpp",
+    "SVGTransformTearOff.h",
     "SVGTreeScopeResources.cpp",
     "SVGTreeScopeResources.h",
     "SVGURIReference.cpp",
@@ -284,9 +307,11 @@ blink_core_sources("svg") {
     "SVGZoomAndPan.cpp",
     "SVGZoomAndPan.h",
     "animation/SMILTime.cpp",
+    "animation/SMILTime.h",
     "animation/SMILTimeContainer.cpp",
     "animation/SMILTimeContainer.h",
     "animation/SVGSMILElement.cpp",
+    "animation/SVGSMILElement.h",
     "graphics/SVGImage.cpp",
     "graphics/SVGImage.h",
     "graphics/SVGImageChromeClient.cpp",
@@ -298,7 +323,9 @@ blink_core_sources("svg") {
     "graphics/filters/SVGFilterBuilder.cpp",
     "graphics/filters/SVGFilterBuilder.h",
     "properties/SVGAnimatedProperty.cpp",
+    "properties/SVGAnimatedProperty.h",
     "properties/SVGPropertyTearOff.cpp",
+    "properties/SVGPropertyTearOff.h",
   ]
 
   configs += [