Updated gMock to 1.7.0

This change updates gMock to the new release, 1.7.0.  This is
necessary for Android, as Android Master has updated their gTest to
1.7.0, and we must always use the matching version of gMock.

This should not break any existing tests, as 1.7.0 is
backwards-compatible with 1.6.0 code in nearly all cases.  There are
a few bugfixes around being too generous with type coercion in
EXPECT_THAT() and ASSERT_THAT() that could break code that was
accepted by the compiler before but was never technically safe.

For a full list of changes, including all the awesome new matchers
you can now use in your tests, see CHANGES, which is included from
gMock unchanged.

For a full list of modifications made to allow this to work on
Android Master, see the updated README.android.

No changes to the GYP files were necessary as part of this upgrade.

Change-Id: Ib1445044e78c9fe0cf16031d544577d65ebbf6df

libwvdrmengine/test/gmock/CHANGES

@@ -1,3 +1,37 @@
+Changes for 1.7.0:
+
+* All new improvements in Google Test 1.7.0.
+* New feature: matchers DoubleNear(), FloatNear(),
+  NanSensitiveDoubleNear(), NanSensitiveFloatNear(),
+  UnorderedElementsAre(), UnorderedElementsAreArray(), WhenSorted(),
+  WhenSortedBy(), IsEmpty(), and SizeIs().
+* Improvement: Google Mock can now be built as a DLL.
+* Improvement: when compiled by a C++11 compiler, matchers AllOf()
+  and AnyOf() can accept an arbitrary number of matchers.
+* Improvement: when compiled by a C++11 compiler, matchers
+  ElementsAreArray() can accept an initializer list.
+* Improvement: when exceptions are enabled, a mock method with no
+  default action now throws instead crashing the test.
+* Improvement: added class testing::StringMatchResultListener to aid
+  definition of composite matchers.
+* Improvement: function return types used in MOCK_METHOD*() macros can
+  now contain unprotected commas.
+* Improvement (potentially breaking): EXPECT_THAT() and ASSERT_THAT()
+  are now more strict in ensuring that the value type and the matcher
+  type are compatible, catching potential bugs in tests.
+* Improvement: Pointee() now works on an optional<T>.
+* Improvement: the ElementsAreArray() matcher can now take a vector or
+  iterator range as input, and makes a copy of its input elements
+  before the conversion to a Matcher.
+* Improvement: the Google Mock Generator can now generate mocks for
+  some class templates.
+* Bug fix: mock object destruction triggerred by another mock object's
+  destruction no longer hangs.
+* Improvement: Google Mock Doctor works better with newer Clang and
+  GCC now.
+* Compatibility fixes.
+* Bug/warning fixes.
+
 Changes for 1.6.0:
 
 * Compilation is much faster and uses much less memory, especially