Revert of cc: Test BeginMainFrame values come from BeginImplFrame.

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index 6ea6b7ffb0905c2d0233b228e7dd59b0c1f3522a..e00023919590f044ccd8bd85f3b486aa530e6302 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -5689,6 +5689,7 @@
       : will_begin_impl_frame_count_(0), did_finish_impl_frame_count_(0) {}
 
   void BeginTest() override {
+    // Kick off the test with a commit.
     PostSetNeedsCommitToMainThread();
   }
 
@@ -5733,70 +5734,6 @@
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostTestWillBeginImplFrameHasDidFinishImplFrame);
-
-::testing::AssertionResult AssertFrameTimeContained(
-    const char* haystack_expr,
-    const char* needle_expr,
-    const std::vector<BeginFrameArgs>& haystack,
-    const BeginFrameArgs& needle) {
-  auto failure = ::testing::AssertionFailure()
-                 << needle.frame_time << " (" << needle_expr
-                 << ") not found in " << haystack_expr;
-
-  if (haystack.size() == 0) {
-    failure << " which is empty.";
-  } else {
-    failure << " which contains:\n";
-    for (size_t i = 0; i < haystack.size(); i++) {
-      if (haystack[i].frame_time == needle.frame_time)
-        return ::testing::AssertionSuccess();
-      failure << "  [" << i << "]: " << haystack[i].frame_time << "\n";
-    }
-  }
-
-  return failure;
-}
-
-class LayerTreeHostTestBeginMainFrameTimeIsAlsoImplTime
-    : public LayerTreeHostTest {
- public:
-  LayerTreeHostTestBeginMainFrameTimeIsAlsoImplTime()
-      : impl_frame_args_(), will_begin_impl_frame_count_(0) {}
-
-  void BeginTest() override {
-    // Kick off the test with a commit.
-    PostSetNeedsCommitToMainThread();
-  }
-
-  void WillBeginImplFrameOnThread(LayerTreeHostImpl* impl,
-                                  const BeginFrameArgs& args) override {
-    impl_frame_args_.push_back(args);
-
-    will_begin_impl_frame_count_++;
-    if (will_begin_impl_frame_count_ < 10)
-      PostSetNeedsCommitToMainThread();
-  }
-
-  void BeginMainFrame(const BeginFrameArgs& args) override {
-    ASSERT_GT(impl_frame_args_.size(), 0U)
-        << "BeginMainFrame called before BeginImplFrame called!";
-    EXPECT_PRED_FORMAT2(AssertFrameTimeContained, impl_frame_args_, args);
-  }
-
-  void SendBeginMainFrameNotExpectedSoon() override { EndTest(); }
-
-  void AfterTest() override {
-    EXPECT_GT(impl_frame_args_.size(), 0U);
-    EXPECT_GE(will_begin_impl_frame_count_, 10);
-  }
-
- private:
-  std::vector<BeginFrameArgs> impl_frame_args_;
-  int will_begin_impl_frame_count_;
-};
-
-SINGLE_AND_MULTI_THREAD_IMPL_TEST_F(
-    LayerTreeHostTestBeginMainFrameTimeIsAlsoImplTime);
 
 class LayerTreeHostTestSendBeginFramesToChildren : public LayerTreeHostTest {
  public: