diff -up chromium-64.0.3282.119/third_party/webgl/src/specs/latest/2.0/webgl2.idl.gcc5 chromium-64.0.3282.119/third_party/webgl/src/specs/latest/2.0/webgl2.idl
--- chromium-64.0.3282.119/third_party/webgl/src/specs/latest/2.0/webgl2.idl.gcc5	2018-01-25 11:07:27.179175007 -0500
+++ chromium-64.0.3282.119/third_party/webgl/src/specs/latest/2.0/webgl2.idl	2018-01-25 11:07:38.037925336 -0500
@@ -263,7 +263,7 @@ interface WebGL2RenderingContextBase
   const GLenum UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES          = 0x8A43;
   const GLenum UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER     = 0x8A44;
   const GLenum UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER   = 0x8A46;
-  const GLenum INVALID_INDEX                                 = 0xFFFFFFFF;
+  const GLenum INVALID_INDEX                                 = 256;
   const GLenum MAX_VERTEX_OUTPUT_COMPONENTS                  = 0x9122;
   const GLenum MAX_FRAGMENT_INPUT_COMPONENTS                 = 0x9125;
   const GLenum MAX_SERVER_WAIT_TIMEOUT                       = 0x9111;
diff -up chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.h.gcc5 chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.h
--- chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.h.gcc5	2018-01-25 11:11:08.581962228 -0500
+++ chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.h	2018-01-25 11:11:24.062593478 -0500
@@ -49,7 +49,7 @@ class NodeFilter final {
      * to the value of NodeType for the equivalent node type.
      */
   enum {
-    kShowAll = 0xFFFFFFFF,
+    kShowAll = 256 /* 0xFFFFFFFF */,
     kShowElement = 0x00000001,
     kShowAttribute = 0x00000002,
     kShowText = 0x00000004,
diff -up chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.idl.gcc5 chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.idl
--- chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.idl.gcc5	2018-01-25 11:11:34.816335412 -0500
+++ chromium-64.0.3282.119/third_party/WebKit/Source/core/dom/NodeFilter.idl	2018-01-25 11:12:23.380171262 -0500
@@ -27,7 +27,7 @@ callback interface NodeFilter {
     const unsigned short FILTER_SKIP = 3;
 
     // Constants for whatToShow
-    const unsigned long SHOW_ALL = 0xFFFFFFFF;
+    const unsigned long SHOW_ALL = 256; // 0xFFFFFFFF
     const unsigned long SHOW_ELEMENT = 0x1;
     const unsigned long SHOW_ATTRIBUTE = 0x2; // historical
     const unsigned long SHOW_TEXT = 0x4;
diff -up chromium-64.0.3282.119/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl.gcc5 chromium-64.0.3282.119/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl
--- chromium-64.0.3282.119/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl.gcc5	2018-01-25 11:12:57.367363214 -0500
+++ chromium-64.0.3282.119/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.idl	2018-01-25 11:13:29.883590960 -0500
@@ -241,7 +241,7 @@ typedef unsigned long long GLuint64;
     const GLenum UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES          = 0x8A43;
     const GLenum UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER     = 0x8A44;
     const GLenum UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER   = 0x8A46;
-    const GLenum INVALID_INDEX                                 = 0xFFFFFFFF;
+    const GLenum INVALID_INDEX                                 = 256;
     const GLenum MAX_VERTEX_OUTPUT_COMPONENTS                  = 0x9122;
     const GLenum MAX_FRAGMENT_INPUT_COMPONENTS                 = 0x9125;
     const GLenum MAX_SERVER_WAIT_TIMEOUT                       = 0x9111;
@@ -271,7 +271,7 @@ typedef unsigned long long GLuint64;
     const GLenum TEXTURE_IMMUTABLE_FORMAT                      = 0x912F;
     const GLenum MAX_ELEMENT_INDEX                             = 0x8D6B;
     const GLenum TEXTURE_IMMUTABLE_LEVELS                      = 0x82DF;
-    const GLint TIMEOUT_IGNORED                                = -1;
+    const GLint TIMEOUT_IGNORED                                = 256;
 
     /* WebGL-specific enums */
     const GLenum MAX_CLIENT_WAIT_TIMEOUT_WEBGL                 = 0x9247;