Be More Forgiving in EXPECT_ALMOST()

(This is a merge of http://go/wvgerrit/14776)

This change widens the range in EXPECT_ALMOST slightly, to allow for
slight timing errors in the tests.

Bug: 21489628
Change-Id: Ibb074c2d037566c307c0438efdda3841bc48f7ed

libwvdrmengine/oemcrypto/test/oemcrypto_test.cpp

@@ -59,6 +59,7 @@ const int kShortSleep = 1 * kSpeedMultiplier;
 const int kLongSleep = 2 * kSpeedMultiplier;
 const uint32_t kDuration = 2 * kSpeedMultiplier;
 const uint32_t kLongDuration = 5 * kSpeedMultiplier;
+const uint32_t kAlmostRange = 3 * kSpeedMultiplier;
 }  // namespace
 
 namespace wvoec {
@@ -736,9 +737,9 @@ static void dump_openssl_error() {
 }
 
 // We don't expect exact timing.
-#define EXPECT_ALMOST(A, B)           \
-  EXPECT_GE(A + kSpeedMultiplier, B); \
-  EXPECT_LE(A - kSpeedMultiplier, B);
+#define EXPECT_ALMOST(A, B)       \
+  EXPECT_GE(A + kAlmostRange, B); \
+  EXPECT_LE(A - kAlmostRange, B);
 
 class Session {
  public: