Call SkGraphics::Init() automatically for Google3 processes.

This is logically a partial revert of https://codereview.chromium.org/1903503002.

BUG=skia:
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Review URL: https://codereview.chromium.org/1906813002

src/core/SkGraphics.cpp

@@ -118,3 +118,8 @@ void SkGraphics::SetFlags(const char* flags) {
         flags = nextSemi + 1;
     } while (nextSemi);
 }
+
+// Call SkGraphics::Init() automatically for Google3 processes.
+#if defined(GOOGLE3)
+    static SkAutoGraphics autoGraphics;
+#endif