WebGL: add targets for WebGL 2 when check FBO targets

Source/core/html/canvas/WebGLRenderingContextBase.cpp

Index: Source/core/html/canvas/WebGLRenderingContextBase.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContextBase.cpp b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
index 6c7ef4a61200aa725abc1486c827a51c0fb337a0..20a085b180248c98cb9fac0fdd9234265515822c 100644
--- a/Source/core/html/canvas/WebGLRenderingContextBase.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContextBase.cpp
@@ -1365,11 +1365,19 @@ void WebGLRenderingContextBase::bufferSubData(GLenum target, long long offset, D
     bufferSubDataImpl(target, offset, data->byteLength(), data->baseAddress());
 }
 
+bool WebGLRenderingContextBase::validateFramebufferTarget(GLenum target)
+{
+    if (target == GL_FRAMEBUFFER)
+        return true;
+    return false;
+}
+
+
 GLenum WebGLRenderingContextBase::checkFramebufferStatus(GLenum target)
 {
     if (isContextLost())
         return GL_FRAMEBUFFER_UNSUPPORTED;
-    if (target != GL_FRAMEBUFFER) {
+    if (!validateFramebufferTarget(target)) {
         synthesizeGLError(GL_INVALID_ENUM, "checkFramebufferStatus", "invalid target");
         return 0;
     }
@@ -5374,7 +5382,7 @@ void WebGLRenderingContextBase::printWarningToConsole(const String& message)
 
 bool WebGLRenderingContextBase::validateFramebufferFuncParameters(const char* functionName, GLenum target, GLenum attachment)
 {
-    if (target != GL_FRAMEBUFFER) {
+    if (!validateFramebufferTarget(target)) {
         synthesizeGLError(GL_INVALID_ENUM, functionName, "invalid target");
         return false;
     }