Fix errors caused by unsafe conversions to/from size_t

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 32 matching lines @@
 TEST(SharedBufferTest, getAsBytes)
 {
     char testData0[] = "Hello";
     char testData1[] = "World";
     char testData2[] = "Goodbye";
 
     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData0, strlen(testData0));
     sharedBuffer->append(testData1, strlen(testData1));
     sharedBuffer->append(testData2, strlen(testData2));
 
-    const unsigned size = sharedBuffer->size();
+    const size_t size = sharedBuffer->size();
     OwnPtr<char[]> data = adoptArrayPtr(new char[size]);
     ASSERT_TRUE(sharedBuffer->getAsBytes(data.get(), size));
 
     char expectedConcatenation[] = "HelloWorldGoodbye";
     ASSERT_EQ(strlen(expectedConcatenation), size);
     EXPECT_EQ(0, memcmp(expectedConcatenation, data.get(), strlen(expectedConcatenation)));
 }
 
 TEST(SharedBufferTest, getAsBytesLargeSegments)
 {
     Vector<char> vector0(0x4000);
     for (size_t i = 0; i < vector0.size(); ++i)
         vector0[i] = 'a';
     Vector<char> vector1(0x4000);
     for (size_t i = 0; i < vector1.size(); ++i)
         vector1[i] = 'b';
     Vector<char> vector2(0x4000);
     for (size_t i = 0; i < vector2.size(); ++i)
         vector2[i] = 'c';
 
     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::adoptVector(vector0);
     sharedBuffer->append(vector1);
     sharedBuffer->append(vector2);
 
-    const unsigned size = sharedBuffer->size();
+    const size_t size = sharedBuffer->size();
     OwnPtr<char[]> data = adoptArrayPtr(new char[size]);
     ASSERT_TRUE(sharedBuffer->getAsBytes(data.get(), size));
 
     ASSERT_EQ(0x4000U + 0x4000U + 0x4000U, size);
     int position = 0;
     for (int i = 0; i < 0x4000; ++i) {
         EXPECT_EQ('a', data[position]);
         ++position;
     }
     for (int i = 0; i < 0x4000; ++i) {
         EXPECT_EQ('b', data[position]);
         ++position;
     }
     for (int i = 0; i < 0x4000; ++i) {
         EXPECT_EQ('c', data[position]);
         ++position;
     }
 }
 
 TEST(SharedBufferTest, copy)
 {
     Vector<char> testData(10000);
     std::generate(testData.begin(), testData.end(), &std::rand);
 
-    unsigned length = testData.size();
+    size_t length = testData.size();
     RefPtr<SharedBuffer> sharedBuffer = SharedBuffer::create(testData.data(), length);
     sharedBuffer->append(testData.data(), length);
     sharedBuffer->append(testData.data(), length);
     sharedBuffer->append(testData.data(), length);
     // sharedBuffer must contain data more than segmentSize (= 0x1000) to check copy().
     ASSERT_EQ(length * 4, sharedBuffer->size());
 
     RefPtr<SharedBuffer> clone = sharedBuffer->copy();
     ASSERT_EQ(length * 4, clone->size());
     ASSERT_EQ(0, memcmp(clone->data(), sharedBuffer->data(), clone->size()));
 
     clone->append(testData.data(), length);
     ASSERT_EQ(length * 5, clone->size());
 }
 
 TEST(SharedBufferTest, constructorWithSizeOnly)
 {
-    unsigned length = 10000;
+    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, 0));
+    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);
 
     TestingPlatformSupport::Config config;
     config.hasDiscardableMemorySupport = true;
     TestingPlatformSupport platformWithDiscardableMemorySupport(config);
 
-    unsigned length = testData.size();
+    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