FBTF: Fix more ctor/dtors found by clang plugin.

gpu/command_buffer/service/framebuffer_manager.cc

Index: gpu/command_buffer/service/framebuffer_manager.cc
diff --git a/gpu/command_buffer/service/framebuffer_manager.cc b/gpu/command_buffer/service/framebuffer_manager.cc
index 9b74f7f97d897d851b8be930e6a5b1d2d14da1ff..6169a66dc9bbc99674aebfaa1f361360f195d92d 100644
--- a/gpu/command_buffer/service/framebuffer_manager.cc
+++ b/gpu/command_buffer/service/framebuffer_manager.cc
@@ -9,6 +9,8 @@
 namespace gpu {
 namespace gles2 {
 
+FramebufferManager::FramebufferManager() {}
+
 FramebufferManager::~FramebufferManager() {
   DCHECK(framebuffer_infos_.empty());
 }
@@ -37,6 +39,12 @@ void FramebufferManager::CreateFramebufferInfo(
   DCHECK(result.second);
 }
 
+FramebufferManager::FramebufferInfo::FramebufferInfo(GLuint service_id)
+    : service_id_(service_id) {
+}
+
+FramebufferManager::FramebufferInfo::~FramebufferInfo() {}
+
 bool FramebufferManager::FramebufferInfo::HasUnclearedAttachment(
     GLenum attachment) const {
   AttachmentToRenderbufferMap::const_iterator it =