Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/command_buffer/GLContext_command_buffer.h

Index: tools/gpu/gl/command_buffer/GLContext_command_buffer.h
diff --git a/tools/gpu/gl/command_buffer/GLContext_command_buffer.h b/tools/gpu/gl/command_buffer/GLContext_command_buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..73f02e2c784f970fdb919705c5e47f6193cddaa4
--- /dev/null
+++ b/tools/gpu/gl/command_buffer/GLContext_command_buffer.h
@@ -0,0 +1,68 @@
+
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GLContext_command_buffer_DEFINED
+#define GLContext_command_buffer_DEFINED
+
+#include "gl/GLContext.h"
+
+namespace sk_gpu_test {
+class CommandBufferGLContext : public GLContext {
+public:
+    ~CommandBufferGLContext() override;
+
+    static CommandBufferGLContext *Create() {
+        CommandBufferGLContext *ctx = new CommandBufferGLContext;
+        if (!ctx->isValid()) {
+            delete ctx;
+            return nullptr;
+        }
+        return ctx;
+    }
+
+    static CommandBufferGLContext *Create(void *nativeWindow, int msaaSampleCount) {
+        CommandBufferGLContext *ctx = new CommandBufferGLContext(nativeWindow, msaaSampleCount);
+        if (!ctx->isValid()) {
+            delete ctx;
+            return nullptr;
+        }
+        return ctx;
+    }
+
+    void presentCommandBuffer();
+
+    bool makeCurrent();
+
+    int getStencilBits();
+
+    int getSampleCount();
+
+private:
+    CommandBufferGLContext();
+
+    CommandBufferGLContext(void *nativeWindow, int msaaSampleCount);
+
+    void initializeGLContext(void *nativeWindow, const int *configAttribs,
+                             const int *surfaceAttribs);
+
+    void destroyGLContext();
+
+    void onPlatformMakeCurrent() const override;
+
+    void onPlatformSwapBuffers() const override;
+
+    GrGLFuncPtr onPlatformGetProcAddress(const char *name) const override;
+
+    void *fContext;
+    void *fDisplay;
+    void *fSurface;
+    void *fConfig;
+};
+}   // namespace sk_gpu_test
+
+#endif