Add support for encoding/decoding WebP images.

blimp/client/app/blimp_startup.cc

Index: blimp/client/app/blimp_startup.cc
diff --git a/blimp/client/app/blimp_startup.cc b/blimp/client/app/blimp_startup.cc
index 0d1f18710fd43926b63d22859a5ecff20f0a20c3..e19ee3f0617976248820b59850f40033cf5e1637 100644
--- a/blimp/client/app/blimp_startup.cc
+++ b/blimp/client/app/blimp_startup.cc
@@ -10,17 +10,25 @@
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "blimp/client/app/blimp_discardable_memory_allocator.h"
+#include "blimp/client/feature/compositor/decoding_image_generator.h"
 #include "third_party/skia/include/core/SkGraphics.h"
 #include "ui/gl/gl_surface.h"
 
+class SkImageGenerator;
+
 namespace {
 base::LazyInstance<scoped_ptr<base::MessageLoopForUI>> g_main_message_loop =
     LAZY_INSTANCE_INITIALIZER;
 
 base::LazyInstance<blimp::client::BlimpDiscardableMemoryAllocator>
     g_discardable_memory_allocator = LAZY_INSTANCE_INITIALIZER;
+
+SkImageGenerator* CreateImageGenerator(SkData* data) {
+  return blimp::client::DecodingImageGenerator::create(data);
 }
 
+}  // namespace
+
 namespace blimp {
 namespace client {
 
@@ -54,6 +62,7 @@ bool InitializeMainMessageLoop() {
   if (!gfx::GLSurface::InitializeOneOff())
     return false;
   SkGraphics::Init();
+  SkGraphics::SetImageGeneratorFromEncodedFactory(CreateImageGenerator);
   g_main_message_loop.Get().reset(new base::MessageLoopForUI);
   return true;
 }