Add extra safety check to the EGL context setup.

src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp

Index: src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp
diff --git a/src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp b/src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp
index 6fc8f48373d9179cd05fb41149096bfa685f168a..1974197f3ebc4c49a89163c2ed770d7c96bc1fb5 100644
--- a/src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp
+++ b/src/gpu/gl/egl/SkCreatePlatformGLContext_egl.cpp
@@ -87,7 +87,7 @@ EGLGLContext::EGLGLContext(GrGLStandard forcedGpuAPI)
             continue;
         }
 
-        EGLint numConfigs;
+        EGLint numConfigs = 0;
         const EGLint configAttribs[] = {
             EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
             EGL_RENDERABLE_TYPE, kAPIs[api].fRenderableTypeBit,
@@ -104,6 +104,11 @@ EGLGLContext::EGLGLContext(GrGLStandard forcedGpuAPI)
             continue;
         }
 
+        if (0 == numConfigs) {
+            SkDebugf("No suitable EGL config found.\n");
+            continue;
+        }
+
         fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, kAPIs[api].fContextAttribs);
         if (EGL_NO_CONTEXT == fContext) {
             SkDebugf("eglCreateContext failed.  EGL Error: 0x%08x\n", eglGetError());