Revert of Add PERSISTENT_MAP usage for GpuMemoryBuffers.

content/common/gpu/client/gpu_memory_buffer_impl_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "base/bind.h"
 #include "content/common/gpu/gpu_memory_buffer_factory.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 61 matching lines @@
 
     // Check if destruction callback is executed when deleting the buffer.
     buffer.reset();
     EXPECT_EQ(0, buffer_count_);
   }
 }
 
 TEST_P(GpuMemoryBufferImplTest, Map) {
   const int kBufferId = 1;
 
-  // Use a multiple of 4 for both dimensions to support compressed formats.
-  gfx::Size buffer_size(4, 4);
+  gfx::Size buffer_size(2, 2);
 
   for (auto configuration : supported_configurations_) {
     if (configuration.usage != gfx::GpuMemoryBuffer::MAP)
       continue;
 
     scoped_ptr<GpuMemoryBufferImpl> buffer(
         GpuMemoryBufferImpl::CreateFromHandle(
             CreateGpuMemoryBuffer(kBufferId, buffer_size, configuration.format,
                                   configuration.usage),
             buffer_size, configuration.format,
@@ skipping 38 matching lines @@
                          data.get(), row_size_in_bytes),
                   0);
       }
     }
 
     buffer->Unmap();
     EXPECT_FALSE(buffer->IsMapped());
   }
 }
 
-TEST_P(GpuMemoryBufferImplTest, PersistentMap) {
-  const int kBufferId = 1;
-
-  // Use a multiple of 4 for both dimensions to support compressed formats.
-  gfx::Size buffer_size(4, 4);
-
-  for (auto configuration : supported_configurations_) {
-    if (configuration.usage != gfx::GpuMemoryBuffer::PERSISTENT_MAP)
-      continue;
-
-    scoped_ptr<GpuMemoryBufferImpl> buffer(
-        GpuMemoryBufferImpl::CreateFromHandle(
-            CreateGpuMemoryBuffer(kBufferId, buffer_size, configuration.format,
-                                  configuration.usage),
-            buffer_size, configuration.format,
-            base::Bind(&GpuMemoryBufferImplTest::DestroyGpuMemoryBuffer,
-                       base::Unretained(this), kBufferId)));
-    ASSERT_TRUE(buffer);
-    EXPECT_FALSE(buffer->IsMapped());
-
-    size_t num_planes =
-        GpuMemoryBufferImpl::NumberOfPlanesForGpuMemoryBufferFormat(
-            configuration.format);
-
-    // Map buffer into user space.
-    scoped_ptr<void* []> mapped_buffers(new void* [num_planes]);
-    bool rv = buffer->Map(mapped_buffers.get());
-    ASSERT_TRUE(rv);
-    EXPECT_TRUE(buffer->IsMapped());
-
-    // Get strides.
-    scoped_ptr<int[]> strides(new int[num_planes]);
-    buffer->GetStride(strides.get());
-
-    // Copy and compare mapped buffers.
-    for (size_t plane = 0; plane < num_planes; ++plane) {
-      size_t row_size_in_bytes;
-      EXPECT_TRUE(GpuMemoryBufferImpl::RowSizeInBytes(
-          buffer_size.width(), configuration.format, plane,
-          &row_size_in_bytes));
-
-      scoped_ptr<char[]> data(new char[row_size_in_bytes]);
-      memset(data.get(), 0x2a + plane, row_size_in_bytes);
-
-      size_t height =
-          buffer_size.height() /
-          GpuMemoryBufferImpl::SubsamplingFactor(configuration.format, plane);
-      for (size_t y = 0; y < height; ++y) {
-        memcpy(static_cast<char*>(mapped_buffers[plane]) + y * strides[plane],
-               data.get(), row_size_in_bytes);
-        EXPECT_EQ(memcmp(static_cast<char*>(mapped_buffers[plane]) +
-                             y * strides[plane],
-                         data.get(), row_size_in_bytes),
-                  0);
-      }
-    }
-
-    buffer->Unmap();
-    EXPECT_FALSE(buffer->IsMapped());
-
-    // Remap the buffer, and compare again. It should contain the same data.
-    rv = buffer->Map(mapped_buffers.get());
-    ASSERT_TRUE(rv);
-    EXPECT_TRUE(buffer->IsMapped());
-
-    buffer->GetStride(strides.get());
-
-    for (size_t plane = 0; plane < num_planes; ++plane) {
-      size_t row_size_in_bytes;
-      EXPECT_TRUE(GpuMemoryBufferImpl::RowSizeInBytes(
-          buffer_size.width(), configuration.format, plane,
-          &row_size_in_bytes));
-
-      scoped_ptr<char[]> data(new char[row_size_in_bytes]);
-      memset(data.get(), 0x2a + plane, row_size_in_bytes);
-
-      size_t height =
-          buffer_size.height() /
-          GpuMemoryBufferImpl::SubsamplingFactor(configuration.format, plane);
-      for (size_t y = 0; y < height; ++y) {
-        EXPECT_EQ(memcmp(static_cast<char*>(mapped_buffers[plane]) +
-                             y * strides[plane],
-                         data.get(), row_size_in_bytes),
-                  0);
-      }
-    }
-
-    buffer->Unmap();
-    EXPECT_FALSE(buffer->IsMapped());
-  }
-}
-
 std::vector<gfx::GpuMemoryBufferType> GetSupportedGpuMemoryBufferTypes() {
   std::vector<gfx::GpuMemoryBufferType> supported_types;
   GpuMemoryBufferFactory::GetSupportedTypes(&supported_types);
   return supported_types;
 }
 
 INSTANTIATE_TEST_CASE_P(
     GpuMemoryBufferImplTests,
     GpuMemoryBufferImplTest,
     ::testing::ValuesIn(GetSupportedGpuMemoryBufferTypes()));
 
 }  // namespace
 }  // namespace content