Move WebGraphicsContext3D::Attributes to Platform::ContextAttributes.

third_party/WebKit/public/platform/Platform.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 439 matching lines @@
     virtual void removeTraceLogEnabledStateObserver(TraceLogEnabledStateObserver*) {}
 
     typedef uint64_t WebMemoryAllocatorDumpGuid;
 
     // Returns guid corresponding to the given string (the hash value) for
     // creating a WebMemoryAllocatorDump.
     virtual WebMemoryAllocatorDumpGuid createWebMemoryAllocatorDumpGuid(const WebString& guidStr) { return 0; }
 
     // GPU ----------------------------------------------------------------
     //
+    struct ContextAttributes {
+        bool shareResources = true;
+        bool preferDiscreteGPU = false;
+        bool noAutomaticFlushes = false;
+        bool failIfMajorPerformanceCaveat = false;
+        unsigned webGLVersion = 0;
+    };
     struct GraphicsInfo {
         unsigned vendorId = 0;
         unsigned deviceId = 0;
         unsigned processCrashCount = 0;
         unsigned resetNotificationStrategy = 0;
         bool sandboxed = false;
         bool amdSwitchable = false;
         bool optimus = false;
         WebString vendorInfo;
         WebString rendererInfo;
         WebString driverVersion;
         WebString errorMessage;
     };
     // Returns a newly allocated and initialized offscreen context provider,
     // backed by an independent context. Returns null if the context cannot be
     // created or initialized.
     // Passing an existing provider to shareContext will create the new context
     // in the same share group as the one passed.
-    virtual WebGraphicsContext3DProvider* createOffscreenGraphicsContext3DProvider(const WebGraphicsContext3D::Attributes&, WebGraphicsContext3DProvider* shareContext, GraphicsInfo* glInfo) { return nullptr; }
+    virtual WebGraphicsContext3DProvider* createOffscreenGraphicsContext3DProvider(
+        const ContextAttributes&,
+        const WebURL& topDocumentURL,
+        WebGraphicsContext3DProvider* shareContext,
+        GraphicsInfo*) { return nullptr; }
 
     // Returns a newly allocated and initialized offscreen context provider,
     // backed by the process-wide shared main thread context. Returns null if
     // the context cannot be created or initialized.
     virtual WebGraphicsContext3DProvider* createSharedOffscreenGraphicsContext3DProvider() { return nullptr; }
 
     // Returns true if the platform is capable of producing an offscreen context suitable for accelerating 2d canvas.
     // This will return false if the platform cannot promise that contexts will be preserved across operations like
     // locking the screen or if the platform cannot provide a context with suitable performance characteristics.
     //
@@ skipping 136 matching lines @@
 protected:
     Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif