Removed common_includes.h reordered includes.

Since we are not using precompiled headers anymore, remove common_includes.h
so that fewer files are included in cpp files.

Reordered includes to be in the following order:
 1) Local ANGLE project headers, ordered by directory in descending depth
 2) GL headers
 3) STL headers
This helps enforce the include-what-you-use principal by reducing the
number of STL headers unexpectedly shared between files.

This include order conflicts with some of the Google c++ style guide
which states that STL includes should be first but this helps us catch
more issues.

Change-Id: I8f7785f4ad574e253dd3c7b4fb1e54d3ce3b99fc
Reviewed-on: https://chromium-review.googlesource.com/214850
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libGLESv2/Context.cpp b/src/libGLESv2/Context.cpp
index 21b37b6..809fddc 100644
--- a/src/libGLESv2/Context.cpp
+++ b/src/libGLESv2/Context.cpp
@@ -7,11 +7,11 @@
 // Context.cpp: Implements the gl::Context class, managing all GL state and performing
 // rendering operations. It is the GLES2 specific implementation of EGLContext.
 
-#include "libGLESv2/common_includes.h"
 #include "libGLESv2/Context.h"
 
 #include "libGLESv2/main.h"
 #include "common/utilities.h"
+#include "common/platform.h"
 #include "libGLESv2/formatutils.h"
 #include "libGLESv2/Buffer.h"
 #include "libGLESv2/Fence.h"
@@ -33,8 +33,7 @@
 
 #include "libEGL/Surface.h"
 
-#undef near
-#undef far
+#include <sstream>
 
 namespace gl
 {