Make the EGLDisplay a non-static member of ANGLETest.

We would create and destroy the display with every test, as it
was not part of the environment.

BUG=angle:730

Change-Id: Iae003f13c8e975ae57d3af2d74f9f058a560046f
Reviewed-on: https://chromium-review.googlesource.com/213291
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/tests/angle_tests/ANGLETest.cpp b/tests/angle_tests/ANGLETest.cpp
index 4b009de..d1dcd47 100644
--- a/tests/angle_tests/ANGLETest.cpp
+++ b/tests/angle_tests/ANGLETest.cpp
@@ -11,11 +11,14 @@
       mAlphaBits(-1),
       mDepthBits(-1),
       mStencilBits(-1),
-      mMultisample(false)
+      mMultisample(false),
+      mConfig(0),
+      mSurface(EGL_NO_SURFACE),
+      mContext(EGL_NO_CONTEXT),
+      mDisplay(EGL_NO_DISPLAY)
 {
 }
 
-EGLDisplay ANGLETest::mDisplay = 0;
 EGLNativeWindowType ANGLETest::mNativeWindow = 0;
 EGLNativeDisplayType ANGLETest::mNativeDisplay = 0;