content: pepper: VideoEncoder: add software encoder support

content/renderer/pepper/pepper_video_encoder_host.h

Index: content/renderer/pepper/pepper_video_encoder_host.h
diff --git a/content/renderer/pepper/pepper_video_encoder_host.h b/content/renderer/pepper/pepper_video_encoder_host.h
index 18c9a8efd6cd592362131e596e1aa32371868c8c..81d9ff587f2e800f87445f8dea27a712d7336d21 100644
--- a/content/renderer/pepper/pepper_video_encoder_host.h
+++ b/content/renderer/pepper/pepper_video_encoder_host.h
@@ -26,6 +26,7 @@ namespace content {
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 class RendererPpapiHost;
+class VideoEncoderShim;
 
 class CONTENT_EXPORT PepperVideoEncoderHost
     : public ppapi::host::ResourceHost,
@@ -38,6 +39,8 @@ class CONTENT_EXPORT PepperVideoEncoderHost
   ~PepperVideoEncoderHost() override;
 
  private:
+  friend class VideoEncoderShim;
+
   // Shared memory buffers.
   struct ShmBuffer {
     ShmBuffer(uint32_t id, scoped_ptr<base::SharedMemory> shm);
@@ -98,6 +101,10 @@ class CONTENT_EXPORT PepperVideoEncoderHost
                           const gfx::Size& input_visible_size,
                           media::VideoCodecProfile output_profile,
                           uint32_t initial_bitrate);
+  bool InitializeSoftware(media::VideoFrame::Format input_format,
+                          const gfx::Size& input_visible_size,
+                          media::VideoCodecProfile output_profile,
+                          uint32_t initial_bitrate);
   void Close();
   void AllocateVideoFrames();
   void SendGetFramesErrorReply(int32_t error);
@@ -108,6 +115,9 @@ class CONTENT_EXPORT PepperVideoEncoderHost
                      uint32_t frame_id);
   void NotifyPepperError(int32_t error);
 
+  // Helper method for VideoEncoderShim.
+  uint8_t* ShmHandleToAddress(int32 buffer_id);
+
   // Non-owning pointer.
   RendererPpapiHost* renderer_ppapi_host_;