Add multi-planar functions to GpuMemoryBuffer

content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc b/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
index 440dbfcec4b9b4ece5f37f28e43442902624c11b..a76305c00f8f8078c3987f26e7a3892cdb52a2f5 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.cc
@@ -68,10 +68,11 @@ GpuMemoryBufferImplSurfaceTexture::CreateFromHandle(
           handle.id, size, format, callback, native_window));
 }
 
-void* GpuMemoryBufferImplSurfaceTexture::Map() {
+bool GpuMemoryBufferImplSurfaceTexture::Map(void** data) {
   TRACE_EVENT0("gpu", "GpuMemoryBufferImplSurfaceTexture::Map");
 
   DCHECK(!mapped_);
+  DCHECK_EQ(num_planes_, 1u);

[reveman, 2015/03/24 20:13:59]

Not needed as it would require us to create a buffer of an unsupported format.
We have other checks preventing that from happening.

[emircan, 2015/03/24 21:43:44]

Done.

   DCHECK(native_window_);
   ANativeWindow_Buffer buffer;
   int status = ANativeWindow_lock(native_window_, &buffer, NULL);
@@ -87,7 +88,8 @@ void* GpuMemoryBufferImplSurfaceTexture::Map() {
   DCHECK_LE(size_.width(), buffer.stride);
   stride_ = stride_in_bytes;
   mapped_ = true;
-  return buffer.bits;
+  data[0] = buffer.bits;
+  return true;
 }
 
 void GpuMemoryBufferImplSurfaceTexture::Unmap() {
@@ -98,8 +100,10 @@ void GpuMemoryBufferImplSurfaceTexture::Unmap() {
   mapped_ = false;
 }
 
-uint32 GpuMemoryBufferImplSurfaceTexture::GetStride() const {
-  return stride_;
+bool GpuMemoryBufferImplSurfaceTexture::GetStride(uint32* stride) const {
+  DCHECK_EQ(num_planes_, 1u);

[reveman, 2015/03/24 20:13:59]

Not needed as it would require us to create a buffer of an unsupported format.
We have other checks preventing that from happening.

[emircan, 2015/03/24 21:43:44]

Done.

+  stride[0] = stride_;
+  return true;
 }
 
 gfx::GpuMemoryBufferHandle GpuMemoryBufferImplSurfaceTexture::GetHandle()