Revert of Disable flaky tests in ChildTracingTest on Android.

components/tracing/child/child_trace_message_filter_browsertest.cc

Index: components/tracing/child/child_trace_message_filter_browsertest.cc
diff --git a/components/tracing/child/child_trace_message_filter_browsertest.cc b/components/tracing/child/child_trace_message_filter_browsertest.cc
index 74bec329f629d8a83f7be9cea271adf405e300c9..d6befb393cac693729a8fa862787cd51ffa4e624 100644
--- a/components/tracing/child/child_trace_message_filter_browsertest.cc
+++ b/components/tracing/child/child_trace_message_filter_browsertest.cc
@@ -198,14 +198,7 @@
 
 // Covers the case of one simple child-initiated memory dump without callback,
 // simulating a global memory dump request to the browser (+ response).
-#if defined(OS_ANDROID)
-// Flaky on Android. http://crbug.com/656729.
-#define MAYBE_SingleChildInitiatedMemoryDump \
-  DISABLED_SingleChildInitiatedMemoryDump
-#else
-#define MAYBE_SingleChildInitiatedMemoryDump SingleChildInitiatedMemoryDump
-#endif
-TEST_F(ChildTracingTest, MAYBE_SingleChildInitiatedMemoryDump) {
+TEST_F(ChildTracingTest, SingleChildInitiatedMemoryDump) {
   EnableTracingWithMemoryDumps();
 
   // Expect that our mock dump provider is called when the emulated memory dump
@@ -237,15 +230,7 @@
 // Covers the case of a global memory dump being requested while another one is
 // in progress and has not been acknowledged by the browser. The second request
 // is expected to fail immediately, while the first one is expected to suceed.
-#if defined(OS_ANDROID)
-// Flaky on Android. http://crbug.com/656729.
-#define MAYBE_OverlappingChildInitiatedMemoryDumps \
-  DISABLED_OverlappingChildInitiatedMemoryDumps
-#else
-#define MAYBE_OverlappingChildInitiatedMemoryDumps \
-  OverlappingChildInitiatedMemoryDumps
-#endif
-TEST_F(ChildTracingTest, MAYBE_OverlappingChildInitiatedMemoryDumps) {
+TEST_F(ChildTracingTest, OverlappingChildInitiatedMemoryDumps) {
   EnableTracingWithMemoryDumps();
 
   // Expect that our mock dump provider is called only once.
@@ -300,15 +285,7 @@
 
 // Covers the case of five child-initiated global memory dumps. Each global dump
 // request has a callback, which is expected to fail for 3 out of 5 cases.
-#if defined(OS_ANDROID)
-// Flaky on Android. http://crbug.com/656729.
-#define MAYBE_MultipleChildInitiatedMemoryDumpWithFailures \
-  DISABLED_MultipleChildInitiatedMemoryDumpWithFailures
-#else
-#define MAYBE_MultipleChildInitiatedMemoryDumpWithFailures \
-  MultipleChildInitiatedMemoryDumpWithFailures
-#endif
-TEST_F(ChildTracingTest, MAYBE_MultipleChildInitiatedMemoryDumpWithFailures) {
+TEST_F(ChildTracingTest, MultipleChildInitiatedMemoryDumpWithFailures) {
   const uint32_t kNumRequests = 5;
   MemoryDumpType kDumpType = MemoryDumpType::EXPLICITLY_TRIGGERED;