Add multi-planar functions to GpuMemoryBuffer

cc/test/test_gpu_memory_buffer_manager.cc

Index: cc/test/test_gpu_memory_buffer_manager.cc
diff --git a/cc/test/test_gpu_memory_buffer_manager.cc b/cc/test/test_gpu_memory_buffer_manager.cc
index 7430051ea6ff16ad6d9160f8d6896b428be87d61..b43cd76c58098572ff97f4cc3959976072ca3db1 100644
--- a/cc/test/test_gpu_memory_buffer_manager.cc
+++ b/cc/test/test_gpu_memory_buffer_manager.cc
@@ -41,13 +41,14 @@ class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
         mapped_(false) {}
 
   // Overridden from gfx::GpuMemoryBuffer:
-  void* Map() override {
+  bool Map(void** data) override {
     DCHECK(!mapped_);
     if (!shared_memory_->Map(StrideInBytes(size_.width(), format_) *
                              size_.height()))
-      return NULL;
+      return false;
     mapped_ = true;
-    return shared_memory_->memory();
+    *data = shared_memory_->memory();
+    return true;
   }
   void Unmap() override {
     DCHECK(mapped_);
@@ -56,8 +57,8 @@ class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
   }
   bool IsMapped() const override { return mapped_; }
   Format GetFormat() const override { return format_; }
-  uint32 GetStride() const override {
-    return StrideInBytes(size_.width(), format_);
+  void GetStride(uint32* stride) const override {
+    *stride = StrideInBytes(size_.width(), format_);
   }
   gfx::GpuMemoryBufferHandle GetHandle() const override {
     gfx::GpuMemoryBufferHandle handle;