Added support for EXTDisjointTimerQuery on the Blink side.

Source/modules/webgl/WebGLRenderingContextBase.h

Index: Source/modules/webgl/WebGLRenderingContextBase.h
diff --git a/Source/modules/webgl/WebGLRenderingContextBase.h b/Source/modules/webgl/WebGLRenderingContextBase.h
index 4099a522390d930d37cb6850f59fd0638e19fd55..4732bf473542c2a45dcdf603f322d467e08cc63b 100644
--- a/Source/modules/webgl/WebGLRenderingContextBase.h
+++ b/Source/modules/webgl/WebGLRenderingContextBase.h
@@ -62,6 +62,7 @@ class ANGLEInstancedArrays;
 class CHROMIUMSubscribeUniform;
 class CHROMIUMValuebuffer;
 class EXTBlendMinMax;
+class EXTDisjointTimerQuery;
 class EXTFragDepth;
 class EXTShaderTextureLOD;
 class EXTsRGB;
@@ -432,6 +433,7 @@ public:
     bool isWebGL2OrHigher() { return version() >= 2; }
 
 protected:
+    friend class EXTDisjointTimerQuery;
     friend class WebGLDrawBuffers;
     friend class WebGLFramebuffer;
     friend class WebGLObject;
@@ -790,6 +792,7 @@ protected:
     ScriptValue getBooleanArrayParameter(ScriptState*, GLenum);
     ScriptValue getFloatParameter(ScriptState*, GLenum);
     ScriptValue getIntParameter(ScriptState*, GLenum);
+    ScriptValue getInt64Parameter(ScriptState*, GLenum);
     ScriptValue getUnsignedIntParameter(ScriptState*, GLenum);
     ScriptValue getWebGLFloatArrayParameter(ScriptState*, GLenum);
     ScriptValue getWebGLIntArrayParameter(ScriptState*, GLenum);