Encode frame number in pixel data for pose sync

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
index 8e4a210338214763eee6a6e64e14e5f582f358b1..931bbc9dea513b6b116c6ab8946e3ffdf3a805e3 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h
@@ -539,6 +539,21 @@ class MODULES_EXPORT WebGLRenderingContextBase : public CanvasRenderingContext {
   void forceRestoreContext();
   void loseContextImpl(LostContextMode, AutoRecoveryMethod);
 
+  enum StateMask {
+    StateInvalid = 0,
+    StateScissorEnabled = 1 << 0,
+    StateScissorBox = 1 << 1,
+    StateClearColor = 1 << 2,
+    StateClearDepthf = 1 << 3,
+    StateClearStencil = 1 << 4,
+    StateStencilMaskSeparate = 1 << 5,
+    StateColorMask = 1 << 6,
+    StateDepthMask = 1 << 7
+  };
+  // stateMask is a bit-mask of StateMask values, indicating the state
+  // settings to be restored from the saved script context.
+  void restoreStateFromContext(int stateMask);
+
   gpu::gles2::GLES2Interface* contextGL() const {
     DrawingBuffer* d = drawingBuffer();
     if (!d)
@@ -761,6 +776,7 @@ class MODULES_EXPORT WebGLRenderingContextBase : public CanvasRenderingContext {
 
   GLfloat m_clearColor[4];
   bool m_scissorEnabled;
+  GLint m_scissorBox[4];
   GLfloat m_clearDepth;
   GLint m_clearStencil;
   GLboolean m_colorMask[4];