Add support for drawing video onto a Java ByteBuffer

remoting/client/jni/chromoting_jni.h

Index: remoting/client/jni/chromoting_jni.h
diff --git a/remoting/client/jni/chromoting_jni.h b/remoting/client/jni/chromoting_jni.h
index 12d2f7ca71f9353f0a2ac36104fbda82ed27e64f..25aeb77a5794d9c77bc87893457666417a6e5ed3 100644
--- a/remoting/client/jni/chromoting_jni.h
+++ b/remoting/client/jni/chromoting_jni.h
@@ -10,12 +10,12 @@
 #include "base/at_exit.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "remoting/base/auto_thread.h"
+#include "remoting/client/jni/chromoting_jni_instance.h"
 #include "remoting/protocol/connection_to_host.h"
 
 template<typename T> struct DefaultSingletonTraits;
 
 namespace remoting {
-class ChromotingJniInstance;
 
 // Class and package name of the Java class supporting the methods we call.
 const char* const JAVA_CLASS = "org/chromium/chromoting/jni/JNIInterface";
@@ -23,7 +23,7 @@ const char* const JAVA_CLASS = "org/chromium/chromoting/jni/JNIInterface";
 // Houses the global resources on which the Chromoting components run
 // (e.g. message loops and task runners). Proxies outgoing JNI calls from its
 // ChromotingJniInstance member to Java. All its methods should be invoked
-// exclusively from the UI thread.
+// exclusively from the UI thread unless otherwise noted.
 class ChromotingJni {
  public:
   // This class is instantiated at process initialization and persists until
@@ -73,6 +73,12 @@ class ChromotingJni {
   // Pops up a dialog box asking the user to enter a PIN.
   void DisplayAuthenticationPrompt();
 
+  // Updates image dimensions and canvas memory space. Call on display thread.
+  void UpdateImageBuffer(int width, int height, jobject buffer);
+
+  // Draws the latest image buffer onto the canvas. Call on the display thread.
+  void RedrawCanvas();
+
  private:
   ChromotingJni();