Make SharedBuffer in Resource non-discardable and remove PurgeableVector

third_party/WebKit/Source/platform/SharedBufferTest.cpp

 /*
  * Copyright (C) 2013 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 136 matching lines @@
     size_t length = 10000;
     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(length);
     ASSERT_EQ(length, sharedBuffer->size());
 
     // The internal flat buffer should have been resized to |length| therefore getSomeData() should
     // directly return the full size.
     const char* data;
     ASSERT_EQ(length, sharedBuffer->getSomeData(data, static_cast<size_t>(0u)));
 }
 
-TEST(SharedBufferTest, createPurgeable)
-{
-    Vector<char> testData(30000);
-    std::generate(testData.begin(), testData.end(), &std::rand);
-
-    size_t length = testData.size();
-    RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::createPurgeable(testData.data(), length);
-    ASSERT_EQ(length, sharedBuffer->size());
-    // Merge the segments into a single vector.
-    const char* data = sharedBuffer->data();
-    ASSERT_EQ(0, memcmp(data, testData.data(), length));
-
-    // Do another append + merge the segments again.
-    size_t previousTestDataSize = testData.size();
-    testData.resize(2 * previousTestDataSize);
-    std::generate(testData.begin() + previousTestDataSize, testData.end(), &std::rand);
-    sharedBuffer->append(testData.data() + previousTestDataSize, previousTestDataSize);
-    ASSERT_EQ(0, memcmp(data, testData.data(), length));
-}
-
 } // namespace blink