vea_unittest: Fix driver doesn't suppport hole in memory mapped file

content/common/gpu/media/video_encode_accelerator_unittest.cc

Index: content/common/gpu/media/video_encode_accelerator_unittest.cc
diff --git a/content/common/gpu/media/video_encode_accelerator_unittest.cc b/content/common/gpu/media/video_encode_accelerator_unittest.cc
index 6c5550187a0b26a228487cb7ea979dc94c6f2e32..2a79d15c333bb1f831b0d478ee0684b99de760c6 100644
--- a/content/common/gpu/media/video_encode_accelerator_unittest.cc
+++ b/content/common/gpu/media/video_encode_accelerator_unittest.cc
@@ -225,6 +225,7 @@ static void CreateAlignedInputStreamFile(const gfx::Size& coded_size,
   std::vector<size_t> coded_bpl(num_planes);
   std::vector<size_t> visible_bpl(num_planes);
   std::vector<size_t> visible_plane_rows(num_planes);
+  std::vector<std::vector<uint8>> padding(num_planes);
 
   // Calculate padding in bytes to be added after each plane required to keep
   // starting addresses of all planes at a 64 byte boudnary. This padding will
@@ -248,6 +249,7 @@ static void CreateAlignedInputStreamFile(const gfx::Size& coded_size,
         media::VideoFrame::Rows(i, kInputFormat, coded_size.height()) -
         visible_plane_rows[i];
     padding_sizes[i] = padding_rows * coded_bpl[i] + Align64Bytes(size) - size;
+    padding[i].resize(padding_sizes[i]);
   }
 
   base::MemoryMappedFile src_file;
@@ -281,6 +283,10 @@ static void CreateAlignedInputStreamFile(const gfx::Size& coded_size,
         src += visible_bpl[i];
         dest_offset += coded_bpl[i];
       }
+      if (padding_sizes[i]) {

[wuchengli, 2015/11/19 03:33:40]

We can use padding[i].size() and remove |padding_sizes| variable.

[kcwu, 2015/11/20 10:04:06]

Done.

+        CHECK(WriteFile(&dest_file, dest_offset, &padding[i][0],

[wuchengli, 2015/11/19 03:33:40]

s/CHECK/LOG_ASSERT/

[kcwu, 2015/11/20 10:04:06]

Done.

+                        padding_sizes[i]));
+      }
       dest_offset += padding_sizes[i];
     }
   }