Change SkTime::GetMSecs to double; ensure values stored in SkMSec do not overflow.

tests/Test.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef skiatest_Test_DEFINED
 #define skiatest_Test_DEFINED
 
@@ skipping 67 matching lines @@
     kNative_GPUTestContexts       = 1 << 2,
     kOther_GPUTestContexts        = 1 << 3, // Other than native, used only for below.
     kAllRendering_GPUTestContexts = kNative_GPUTestContexts | kOther_GPUTestContexts,
     kAll_GPUTestContexts          = kAllRendering_GPUTestContexts
                                        | kNull_GPUTestContexts
                                        | kDebug_GPUTestContexts
 };
 template<typename T>
 void RunWithGPUTestContexts(T testFunction, GPUTestContexts contexts, Reporter* reporter,
                             GrContextFactory* factory);
+
+/** Timer provides wall-clock duration since its creation. */
+class Timer {
+public:
+    /** Starts the timer. */
+    Timer();
+
+    /** Nanoseconds since creation. */
+    double elapsedNs() const;
+
+    /** Milliseconds since creation. */
+    double elapsedMs() const;
+
+    /** Milliseconds since creation as an integer.
+        Behavior is undefined for durations longer than SK_MSecMax.
+    */
+    SkMSec elapsedMsInt() const;
+private:
+    double fStartNanos;
+};
+
 }  // namespace skiatest
 
 #define REPORTER_ASSERT(r, cond)                  \
     do {                                          \
         if (!(cond)) {                            \
             REPORT_FAILURE(r, #cond, SkString()); \
         }                                         \
     } while (0)
 
 #define REPORTER_ASSERT_MESSAGE(r, cond, message)        \
@@ skipping 60 matching lines @@
     do {                                                                      \
         SkDynamicMemoryWStream testStream;                                    \
         SkAutoTUnref<SkDocument> testDoc(SkDocument::CreatePDF(&testStream)); \
         if (!testDoc) {                                                       \
             INFOF(REPORTER, "PDF disabled; %s test skipped.", #TEST_NAME);    \
             return;                                                           \
         }                                                                     \
     } while (false)
 
 #endif