Fixed spec compliance issues in WebGLRenderingContext.

Source/core/html/canvas/WebGLRenderingContext.idl

Index: Source/core/html/canvas/WebGLRenderingContext.idl
diff --git a/Source/core/html/canvas/WebGLRenderingContext.idl b/Source/core/html/canvas/WebGLRenderingContext.idl
index 61b5ece3489ca023a20972239bbfb465f4fb0fbf..dc5761f6b6f1726eeb130343505eee5b951a28e7 100644
--- a/Source/core/html/canvas/WebGLRenderingContext.idl
+++ b/Source/core/html/canvas/WebGLRenderingContext.idl
@@ -236,7 +236,6 @@ typedef /*unrestricted*/ float GLclampf;
     const GLenum INT                            = 0x1404;
     const GLenum UNSIGNED_INT                   = 0x1405;
     const GLenum FLOAT                          = 0x1406;
-    const GLenum HALF_FLOAT_OES                 = 0x8D61;
 
     /* PixelFormat */
     const GLenum DEPTH_COMPONENT                = 0x1902;
@@ -587,7 +586,6 @@ typedef /*unrestricted*/ float GLclampf;
 
     [StrictTypeChecking, RaisesException] void         readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView pixels);
     
-    [StrictTypeChecking] void         releaseShaderCompiler();
     [StrictTypeChecking] void         renderbufferStorage(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
     [StrictTypeChecking] void         sampleCoverage(GLclampf value, GLboolean invert);
     [StrictTypeChecking] void         scissor(GLint x, GLint y, GLsizei width, GLsizei height);