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..f1c431d142dd37d28054ec50104a731fe15d4b83 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
@@ -68,7 +68,7 @@ GpuMemoryBufferImplSurfaceTexture::CreateFromHandle(
           handle.id, size, format, callback, native_window));
 }
 
-void* GpuMemoryBufferImplSurfaceTexture::Map() {
+bool GpuMemoryBufferImplSurfaceTexture::Map(void** data) {
   TRACE_EVENT0("gpu", "GpuMemoryBufferImplSurfaceTexture::Map");
 
   DCHECK(!mapped_);
@@ -87,7 +87,8 @@ void* GpuMemoryBufferImplSurfaceTexture::Map() {
   DCHECK_LE(size_.width(), buffer.stride);
   stride_ = stride_in_bytes;
   mapped_ = true;
-  return buffer.bits;
+  *data = buffer.bits;
+  return true;
 }
 
 void GpuMemoryBufferImplSurfaceTexture::Unmap() {
@@ -98,8 +99,8 @@ void GpuMemoryBufferImplSurfaceTexture::Unmap() {
   mapped_ = false;
 }
 
-uint32 GpuMemoryBufferImplSurfaceTexture::GetStride() const {
-  return stride_;
+void GpuMemoryBufferImplSurfaceTexture::GetStride(uint32* stride) const {
+  *stride = stride_;
 }
 
 gfx::GpuMemoryBufferHandle GpuMemoryBufferImplSurfaceTexture::GetHandle()