Add stride for imported Dmabuf in ArcVideoAccelerator.

chrome/gpu/arc_gpu_video_decode_accelerator.h

Index: chrome/gpu/arc_gpu_video_decode_accelerator.h
diff --git a/chrome/gpu/arc_gpu_video_decode_accelerator.h b/chrome/gpu/arc_gpu_video_decode_accelerator.h
index e29f9aaa69344014aa6a94692a838ac119e410b8..48a150cf4ffe3fe8292f1cd83c5145c22539c3e7 100644
--- a/chrome/gpu/arc_gpu_video_decode_accelerator.h
+++ b/chrome/gpu/arc_gpu_video_decode_accelerator.h
@@ -42,7 +42,8 @@ class ArcGpuVideoDecodeAccelerator
                         size_t length) override;
   void BindDmabuf(PortType port,
                   uint32_t index,
-                  base::ScopedFD dmabuf_fd) override;
+                  base::ScopedFD dmabuf_fd,
+                  int32_t stride) override;
   void UseBuffer(PortType port,
                  uint32_t index,
                  const BufferMetadata& metadata) override;
@@ -78,12 +79,22 @@ class ArcGpuVideoDecodeAccelerator
     // The file handle to access the buffer. It is owned by this class and
     // should be closed after use.
     base::ScopedFD handle;
-    off_t offset;
-    size_t length;
+    off_t offset = 0;
+    size_t length = 0;
 
-    InputBufferInfo();
-    InputBufferInfo(InputBufferInfo&& other);
-    ~InputBufferInfo();
+    InputBufferInfo() = default;

[kcwu, 2016/05/05 10:10:04]

IIUC, please put these "= default" lines in .cpp in order to avoid compiler to
generate these default methods more than once.

[Owen Lin, 2016/05/06 05:38:34]

Done.

+    InputBufferInfo(InputBufferInfo&& other) = default;
+    ~InputBufferInfo() = default;
+  };
+
+  // The information about the Dmabuf used as an output buffer.
+  struct OutputBufferInfo {
+    base::ScopedFD handle;
+    int32_t stride;

[kcwu, 2016/05/05 10:10:05]

= 0

[Owen Lin, 2016/05/06 05:38:34]

Done.

+
+    OutputBufferInfo() = default;
+    OutputBufferInfo(OutputBufferInfo&& other) = default;
+    ~OutputBufferInfo() = default;
   };
 
   // Helper function to Send the end-of-stream output buffer if
@@ -136,7 +147,7 @@ class ArcGpuVideoDecodeAccelerator
   // To keep those output buffers which have been bound by bindDmabuf() but not
   // be used yet. Will call VDA::ImportBufferForPicture() when those buffers are
   // used for the first time.
-  std::vector<base::ScopedFD> buffers_pending_import_;
+  std::vector<OutputBufferInfo> buffers_pending_import_;
 
   base::ThreadChecker thread_checker_;
   size_t output_buffer_size_;