Expose GLES2Interface to blink, and delete isContextLost() from WGC3D.

third_party/WebKit/public/platform/WebGraphicsContext3D.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGraphicsContext3D_h
 #define WebGraphicsContext3D_h
 
 #include "WebCommon.h"
 #include "WebNonCopyable.h"
 #include "WebString.h"
 
+namespace gpu {
+namespace gles2 {
+class GLES2Interface;
+}
+}
+
 struct GrGLInterface;
 
 namespace blink {
 
 // WGC3D types match the corresponding GL types as defined in OpenGL ES 2.0
 // header file gl2.h from khronos.org.
 typedef char WGC3Dchar;
 typedef unsigned WGC3Denum;
 typedef unsigned char WGC3Dboolean;
 typedef unsigned WGC3Dbitfield;
@@ skipping 114 matching lines @@
     // Synthesizes an OpenGL error which will be returned from a
     // later call to getError. This is used to emulate OpenGL ES
     // 2.0 behavior on the desktop and to enforce additional error
     // checking mandated by WebGL.
     //
     // Per the behavior of glGetError, this stores at most one
     // instance of any given error, and returns them from calls to
     // getError in the order they were added.
     virtual void synthesizeGLError(WGC3Denum) = 0;
 
-    virtual bool isContextLost() = 0;
-
     // GL_CHROMIUM_map_sub
     virtual void* mapBufferSubDataCHROMIUM(WGC3Denum target, WGC3Dintptr offset, WGC3Dsizeiptr size, WGC3Denum access) = 0;
     virtual void unmapBufferSubDataCHROMIUM(const void*) = 0;
     virtual void* mapTexSubImage2DCHROMIUM(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, WGC3Denum access) = 0;
     virtual void unmapTexSubImage2DCHROMIUM(const void*) = 0;
 
     // GL_CHROMIUM_request_extension
     virtual WebString getRequestableExtensionsCHROMIUM() = 0;
     virtual void requestExtensionCHROMIUM(const char*) = 0;
 
@@ skipping 359 matching lines @@
     virtual void uniformMatrix4x2fv(WGC3Dint location, WGC3Dsizei count, WGC3Dboolean transpose, const WGC3Dfloat* value) { }
     virtual void uniformMatrix4x3fv(WGC3Dint location, WGC3Dsizei count, WGC3Dboolean transpose, const WGC3Dfloat* value) { }
     virtual WGC3Dboolean unmapBuffer(WGC3Denum target) { return false; }
 
     virtual void vertexAttribI4i(WGC3Duint index, WGC3Dint x, WGC3Dint y, WGC3Dint z, WGC3Dint w) { }
     virtual void vertexAttribI4iv(WGC3Duint index, const WGC3Dint *v) { }
     virtual void vertexAttribI4ui(WGC3Duint index, WGC3Duint x, WGC3Duint y, WGC3Duint z, WGC3Duint w) { }
     virtual void vertexAttribI4uiv(WGC3Duint index, const WGC3Duint *v) { }
     virtual void vertexAttribIPointer(WGC3Duint index, WGC3Dint size, WGC3Denum type, WGC3Dsizei stride, WGC3Dintptr pointer) { }
     virtual void waitSync(WGC3Dsync sync, WGC3Dbitfield flags, WGC3Duint64 timeout) { }
+
+    // Prefer getting a GLES2Interface off WebGraphicsContext3DProvider if possible, and avoid using WebGraphicsContext3D at all.
+    virtual gpu::gles2::GLES2Interface* getGLES2Interface() = 0;
 };
 
 } // namespace blink
 
 #endif