Implement support for rendering to 32-bit float textures on ES3

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index c469bf8743503a90eccdb57dad657f6477667414..a52c65dd2747e4702bc1a14d55bb80295edd3855 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -46,7 +46,8 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
     virtual bool CanRenderTo() const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(
-        GLenum attachment_type, uint32 max_color_attachments) = 0;
+        GLenum attachment_type, uint32 max_color_attachments,
+        bool allow_float_color_attachment) = 0;
     virtual void AddToSignature(
         TextureManager* texture_manager, std::string* signature) const = 0;
 
@@ -115,7 +116,7 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
   // Note that receiving GL_FRAMEBUFFER_COMPLETE from this function does
   // not mean the real OpenGL will consider it framebuffer complete. It just
   // means it passed our tests.
-  GLenum IsPossiblyComplete() const;
+  GLenum IsPossiblyComplete(bool allow_float_color_attachment) const;
 
   // Implements optimized glGetFramebufferStatus.
   GLenum GetStatus(TextureManager* texture_manager, GLenum target) const;