Change transport dib API to not make copies of SharedMemoryHandle.

content/renderer/pepper/ppb_image_data_impl.cc

Index: content/renderer/pepper/ppb_image_data_impl.cc
diff --git a/content/renderer/pepper/ppb_image_data_impl.cc b/content/renderer/pepper/ppb_image_data_impl.cc
index 767b5fa7097f47a79f68bc9449df10efb7dc9bcd..64d269adda9c9b0d5fca1c9a73099c2b57bd7fda 100644
--- a/content/renderer/pepper/ppb_image_data_impl.cc
+++ b/content/renderer/pepper/ppb_image_data_impl.cc
@@ -105,9 +105,9 @@ void* PPB_ImageData_Impl::Map() { return backend_->Map(); }
 
 void PPB_ImageData_Impl::Unmap() { backend_->Unmap(); }
 
-int32_t PPB_ImageData_Impl::GetSharedMemory(base::SharedMemoryHandle* handle,
+int32_t PPB_ImageData_Impl::GetSharedMemory(base::SharedMemory** shm,
                                             uint32_t* byte_count) {
-  return backend_->GetSharedMemory(handle, byte_count);
+  return backend_->GetSharedMemory(shm, byte_count);
 }
 
 skia::PlatformCanvas* PPB_ImageData_Impl::GetPlatformCanvas() {
@@ -188,11 +188,10 @@ void ImageDataPlatformBackend::Unmap() {
   // in the future to save some memory.
 }
 
-int32_t ImageDataPlatformBackend::GetSharedMemory(
-    base::SharedMemoryHandle* handle,
-    uint32_t* byte_count) {
+int32_t ImageDataPlatformBackend::GetSharedMemory(base::SharedMemory** shm,
+                                                  uint32_t* byte_count) {
   *byte_count = dib_->size();
-  *handle = dib_->handle();
+  *shm = dib_->shared_memory();
   return PP_OK;
 }
 
@@ -250,11 +249,10 @@ void ImageDataSimpleBackend::Unmap() {
     shared_memory_->Unmap();
 }
 
-int32_t ImageDataSimpleBackend::GetSharedMemory(
-    base::SharedMemoryHandle* handle,
-    uint32_t* byte_count) {
+int32_t ImageDataSimpleBackend::GetSharedMemory(base::SharedMemory** shm,
+                                                uint32_t* byte_count) {
   *byte_count = skia_bitmap_.getSize();
-  *handle = shared_memory_->handle();
+  *shm = shared_memory_.get();
   return PP_OK;
 }