[PPAPI] Add browser tests for compositor API

ppapi/proxy/compositor_layer_resource.cc

Index: ppapi/proxy/compositor_layer_resource.cc
diff --git a/ppapi/proxy/compositor_layer_resource.cc b/ppapi/proxy/compositor_layer_resource.cc
index fb1bbe5139aa863c14d697558e12f15a9beb6b28..376227029cf24c1a0d00193011f4b183c1ccabdf 100644
--- a/ppapi/proxy/compositor_layer_resource.cc
+++ b/ppapi/proxy/compositor_layer_resource.cc
@@ -45,6 +45,7 @@ float clamp(float value) {
 }
 
 void OnTextureReleased(
+    const scoped_refptr<CompositorResource> compositor,
     const ScopedPPResource& layer,
     const ScopedPPResource& context,
     uint32_t texture,
@@ -73,6 +74,7 @@ void OnTextureReleased(
 }
 
 void OnImageReleased(
+    const scoped_refptr<CompositorResource> compositor,
     const ScopedPPResource& layer,
     const ScopedPPResource& image,
     const scoped_refptr<TrackedCallback>& release_callback,
@@ -88,7 +90,7 @@ void OnImageReleased(
 CompositorLayerResource::CompositorLayerResource(
     Connection connection,
     PP_Instance instance,
-    const CompositorResource* compositor)
+    scoped_refptr<CompositorResource> compositor)
     : PluginResource(connection, instance),
       compositor_(compositor),
       source_size_(PP_MakeFloatSize(0.0f, 0.0f)) {
@@ -112,6 +114,8 @@ int32_t CompositorLayerResource::SetColor(float red,
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -122,7 +126,6 @@ int32_t CompositorLayerResource::SetColor(float red,
   if (!size)
     return PP_ERROR_BADARGUMENT;
 
-
   data_.color->red = clamp(red);
   data_.color->green = clamp(green);
   data_.color->blue = clamp(blue);
@@ -177,8 +180,11 @@ int32_t CompositorLayerResource::SetTexture(
   // in this layer may still being used by chromium compositor. So we have to
   // use ScopedPPResource to keep this resource alive until the texture or image
   // is released by the chromium compositor.
+  // We also need keep the compositor alive, otherwise we will not receive
+  // the release IPC message for the texture.
   release_callback_ = base::Bind(
       &OnTextureReleased,
+      compositor_, // Keep compositor alive.
       ScopedPPResource(pp_resource()), // Keep layer alive.
       ScopedPPResource(context), // Keep context alive
       texture,
@@ -225,8 +231,16 @@ int32_t CompositorLayerResource::SetImage(
   data_.image->source_rect.point = PP_MakeFloatPoint(0.0f, 0.0f);
   data_.image->source_rect.size = source_size_;
 
+  // If the PP_Resource of this layer is released by the plugin, the
+  // release_callback will be aborted immediately, but the texture or image
+  // in this layer may still being used by chromium compositor. So we have to
+  // use ScopedPPResource to keep this resource alive until the texture or image
+  // is released by the chromium compositor.
+  // We also need keep the compositor alive, otherwise we will not receive
+  // the release IPC message for the image.
   release_callback_ = base::Bind(
       &OnImageReleased,
+      compositor_, // Keep compositor alive.
       ScopedPPResource(pp_resource()), // Keep layer alive.
       ScopedPPResource(image_data), // Keep image_data alive.
       release_callback);
@@ -238,6 +252,8 @@ int32_t CompositorLayerResource::SetClipRect(const PP_Rect* rect) {
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -249,6 +265,8 @@ int32_t CompositorLayerResource::SetTransform(const float matrix[16]) {
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -260,6 +278,8 @@ int32_t CompositorLayerResource::SetOpacity(float opacity) {
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -271,6 +291,8 @@ int32_t CompositorLayerResource::SetBlendMode(PP_BlendMode mode) {
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -288,6 +310,8 @@ int32_t CompositorLayerResource::SetSourceRect(
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -314,6 +338,8 @@ int32_t CompositorLayerResource::SetPremultipliedAlpha(PP_Bool premult) {
   if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;
 
@@ -351,9 +377,11 @@ bool CompositorLayerResource::SetType(LayerType type) {
 int32_t CompositorLayerResource::CheckForSetTextureAndImage(
     LayerType type,
     const scoped_refptr<TrackedCallback>& release_callback) {
- if (!compositor_)
+  if (!compositor_)
     return PP_ERROR_BADRESOURCE;
 
+  CHECK(compositor_->bound_to_instance());
+
   if (compositor_->IsInProgress())
     return PP_ERROR_INPROGRESS;