Added support for EXTDisjointTimerQuery on the Blink side.

Source/modules/webgl/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 2848 matching lines @@
     case GL_MAX_COLOR_ATTACHMENTS_EXT: // EXT_draw_buffers BEGIN
         if (extensionEnabled(WebGLDrawBuffersName) || isWebGL2OrHigher())
             return WebGLAny(scriptState, maxColorAttachments());
         synthesizeGLError(GL_INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_draw_buffers not enabled");
         return ScriptValue::createNull(scriptState);
     case GL_MAX_DRAW_BUFFERS_EXT:
         if (extensionEnabled(WebGLDrawBuffersName) || isWebGL2OrHigher())
             return WebGLAny(scriptState, maxDrawBuffers());
         synthesizeGLError(GL_INVALID_ENUM, "getParameter", "invalid parameter name, WEBGL_draw_buffers not enabled");
         return ScriptValue::createNull(scriptState);
+    case GL_TIMESTAMP_EXT:
+        if (extensionEnabled(EXTDisjointTimerQueryName))
+            return getInt64Parameter(scriptState, GL_TIMESTAMP_EXT);
+        return ScriptValue::createNull(scriptState);

[Ken Russell (switch to Gerrit), 2015/09/04 01:17:09]

This should generate an INVALID_ENUM error if the extension isn't enabled; see
MAX_DRAW_BUFFERS_EXT above for a similar example.

[David Yen, 2015/09/04 16:04:41]

Done.

+    case GL_GPU_DISJOINT_EXT:
+        if (extensionEnabled(EXTDisjointTimerQueryName))
+            return getBooleanParameter(scriptState, GL_GPU_DISJOINT_EXT);
+        return ScriptValue::createNull(scriptState);

[Ken Russell (switch to Gerrit), 2015/09/04 01:17:09]

Same thing here.

[David Yen, 2015/09/04 16:04:41]

Done.

+
     default:
         if ((extensionEnabled(WebGLDrawBuffersName) || isWebGL2OrHigher())
             && pname >= GL_DRAW_BUFFER0_EXT
             && pname < static_cast<GLenum>(GL_DRAW_BUFFER0_EXT + maxDrawBuffers())) {
             GLint value = GL_NONE;
             if (m_framebufferBinding)
                 value = m_framebufferBinding->getDrawBuffer(pname);
             else // emulated backbuffer
                 value = m_backDrawBuffer;
             return WebGLAny(scriptState, value);
@@ skipping 2282 matching lines @@
 }
 
 ScriptValue WebGLRenderingContextBase::getIntParameter(ScriptState* scriptState, GLenum pname)
 {
     GLint value = 0;
     if (!isContextLost())
         webContext()->getIntegerv(pname, &value);
     return WebGLAny(scriptState, value);
 }
 
+ScriptValue WebGLRenderingContextBase::getInt64Parameter(ScriptState* scriptState, GLenum pname)
+{
+    GLint64 value = 0;
+    if (!isContextLost())
+        webContext()->getInteger64v(pname, &value);
+    return WebGLAny(scriptState, value);
+}
+
 ScriptValue WebGLRenderingContextBase::getUnsignedIntParameter(ScriptState* scriptState, GLenum pname)
 {
     GLint value = 0;
     if (!isContextLost())
         webContext()->getIntegerv(pname, &value);
     return WebGLAny(scriptState, static_cast<unsigned>(value));
 }
 
 ScriptValue WebGLRenderingContextBase::getWebGLFloatArrayParameter(ScriptState* scriptState, GLenum pname)
 {
@@ skipping 1521 matching lines @@
 
     return totalBytesPerPixel;
 }
 
 DrawingBuffer* WebGLRenderingContextBase::drawingBuffer() const
 {
     return m_drawingBuffer.get();
 }
 
 } // namespace blink