Revert of More regular Platform implementations in unit tests (reland.)

third_party/WebKit/Source/platform/TestingPlatformSupport.h

+/*
+ * Copyright (C) 2014 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TestingPlatformSupport_h
+#define TestingPlatformSupport_h
+
+#include "public/platform/Platform.h"
+#include "public/platform/WebDiscardableMemory.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class TestingDiscardableMemory : public WebDiscardableMemory {
+public:
+    explicit TestingDiscardableMemory(size_t);
+    ~TestingDiscardableMemory() override;
+
+    // WebDiscardableMemory:
+    bool lock() override;
+    void* data() override;
+    void unlock() override;
+    WebMemoryAllocatorDump* createMemoryAllocatorDump(const WebString& name, WebProcessMemoryDump*) const override;
+
+private:
+    Vector<char> m_data;
+    bool m_isLocked;
+};
+
+class TestingPlatformSupport : public Platform {
+public:
+    struct Config {
+        Config()
+            : hasDiscardableMemorySupport(false)
+            , compositorSupport(nullptr) { }
+
+        bool hasDiscardableMemorySupport;
+        WebCompositorSupport* compositorSupport;
+    };
+
+    explicit TestingPlatformSupport(const Config&);
+
+    ~TestingPlatformSupport() override;
+
+    // Platform:
+    WebDiscardableMemory* allocateAndLockDiscardableMemory(size_t bytes) override;
+    void cryptographicallyRandomValues(unsigned char* buffer, size_t length) override;
+    const unsigned char* getTraceCategoryEnabledFlag(const char* categoryName) override;
+    WebString defaultLocale() override;
+    WebCompositorSupport* compositorSupport() override;
+
+private:
+    const Config m_config;
+    Platform* const m_oldPlatform;
+};
+
+} // namespace blink
+
+#endif // TestingPlatformSupport_h