content: Add GpuMemoryBuffer MemoryDumpProvider implementation.

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 92 matching lines @@
     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 i = 0; i < num_planes; ++i) {
-      size_t width_in_bytes = 0u;
-      EXPECT_TRUE(GpuMemoryBufferImpl::StrideInBytes(
-          buffer_size.width(), configuration.format, i, &width_in_bytes));
-      EXPECT_GT(width_in_bytes, 0u);
+    for (size_t plane = 0; plane < num_planes; ++plane) {
+      size_t row_size_in_bytes = 0;
+      EXPECT_TRUE(GpuMemoryBufferImpl::RowSizeInBytes(
+          buffer_size.width(), configuration.format, plane,
+          &row_size_in_bytes));
+      EXPECT_GT(row_size_in_bytes, 0u);
 
-      scoped_ptr<char[]> data(new char[width_in_bytes]);
-      memset(data.get(), 0x2a + i, width_in_bytes);
-      memcpy(mapped_buffers[i], data.get(), width_in_bytes);
-      EXPECT_EQ(memcmp(mapped_buffers[i], data.get(), width_in_bytes), 0);
+      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());
   }
 }
 
 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