Add OES_texture_half_float extension support in WebGL.

Source/core/html/canvas/WebGLRenderingContext.cpp

Index: Source/core/html/canvas/WebGLRenderingContext.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContext.cpp b/Source/core/html/canvas/WebGLRenderingContext.cpp
index 5e4be277e3e9c4314adec09b8adda4a6bb2d565d..ef27434686076308c493edc4cdef7e41a2376938 100644
--- a/Source/core/html/canvas/WebGLRenderingContext.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContext.cpp
@@ -3690,13 +3690,6 @@ void WebGLRenderingContext::texImage2DImpl(GC3Denum target, GC3Dint level, GC3De
 
 bool WebGLRenderingContext::validateTexFunc(const char* functionName, TexFuncValidationFunctionType functionType, TexFuncValidationSourceType sourceType, GC3Denum target, GC3Dint level, GC3Denum internalformat, GC3Dsizei width, GC3Dsizei height, GC3Dint border, GC3Denum format, GC3Denum type, GC3Dint xoffset, GC3Dint yoffset)
 {
-    // FIXME: Uploading {ImageData, HTMLImageElement, HTMLCanvasElement, HTMLVideoElement} to half floating point texture is not supported yet.
-    // See https://bugs.webkit.org/show_bug.cgi?id=110936.
-    if (sourceType != SourceArrayBufferView && type == GraphicsContext3D::HALF_FLOAT_OES) {
-        synthesizeGLError(GraphicsContext3D::INVALID_OPERATION, functionName, "Operation not supported yet");
-        return false;
-    }
-
     if (!validateTexFuncParameters(functionName, functionType, target, level, internalformat, width, height, border, format, type))
         return false;