Revert "Store value types for FBO attachments."

In file included from ../../third_party/angle/src/libANGLE/Framebuffer.cpp:10:
In file included from ../../third_party/angle/src/libANGLE/Framebuffer.h:13:
In file included from /Applications/Xcode5.1.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/usr/include/c++/4.2.1/vector:68:
/Applications/Xcode5.1.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/usr/include/c++/4.2.1/bits/stl_construct.h:81:38: error: call to implicitly-deleted copy constructor of 'gl::FramebufferAttachment'
      ::new(static_cast<void*>(__p)) _T1(__value);
                                     ^   ~~~~~~~
This reverts commit 13773b26dfb29b963ea727e1ebf7bdabdc5892b1.

Change-Id: If79f2797fe46798cbe5b39d83c9bcb1a7e87026d
Reviewed-on: https://chromium-review.googlesource.com/266643
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/validationES.cpp b/src/libANGLE/validationES.cpp
index 350f6f6..3008c05 100644
--- a/src/libANGLE/validationES.cpp
+++ b/src/libANGLE/validationES.cpp
@@ -636,8 +636,8 @@
     {
         if (mask & masks[i])
         {
-            const gl::FramebufferAttachment *readBuffer = readFramebuffer->getAttachment(attachments[i]);
-            const gl::FramebufferAttachment *drawBuffer = drawFramebuffer->getAttachment(attachments[i]);
+            gl::FramebufferAttachment *readBuffer = readFramebuffer->getAttachment(attachments[i]);
+            gl::FramebufferAttachment *drawBuffer = drawFramebuffer->getAttachment(attachments[i]);
 
             if (readBuffer && drawBuffer)
             {