Remove SkThread::setProcessorAffinity()

It's only used by a couple unit tests.  We have other ways of getting
the same quality testing of our ref-count code now (e.g. TSAN).

BUG=skia:
CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac10.9-Clang-x86_64-Release-CMake-Trybot

Review URL: https://codereview.chromium.org/1408213005

1 files changed, 1 insertions, 39 deletions

diff --git a/src/utils/SkThreadUtils_win.cpp b/src/utils/SkThreadUtils_win.cpp
index a5efb939f3..07cceee142 100644
--- a/src/utils/SkThreadUtils_win.cpp
+++ b/src/utils/SkThreadUtils_win.cpp
@@ -53,7 +53,7 @@ SkThread::SkThread(entryPointProc entryPoint, void* data) {
         0,                      // use default stack size
         thread_start,           // thread function name (proxy)
         winData,                // argument to thread function (proxy args)
-        CREATE_SUSPENDED,       // create suspended so affinity can be set
+        CREATE_SUSPENDED,       // we used to set processor affinity, which needed this
         &winData->fThreadId);   // returns the thread identifier
 }
 
@@ -96,41 +96,3 @@ void SkThread::join() {
 
     WaitForSingleObject(winData->fHandle, INFINITE);
 }
-
-static unsigned int num_bits_set(DWORD_PTR mask) {
-    unsigned int count;
-    for (count = 0; mask; ++count) {
-        mask &= mask - 1;
-    }
-    return count;
-}
-
-static unsigned int nth_set_bit(unsigned int n, DWORD_PTR mask) {
-    n %= num_bits_set(mask);
-    for (unsigned int setBitsSeen = 0, currentBit = 0; true; ++currentBit) {
-        if (mask & (static_cast<DWORD_PTR>(1) << currentBit)) {
-            ++setBitsSeen;
-            if (setBitsSeen > n) {
-                return currentBit;
-            }
-        }
-    }
-}
-
-bool SkThread::setProcessorAffinity(unsigned int processor) {
-    SkThread_WinData* winData = static_cast<SkThread_WinData*>(fData);
-    if (nullptr == winData->fHandle) {
-        return false;
-    }
-
-    DWORD_PTR processAffinityMask;
-    DWORD_PTR systemAffinityMask;
-    if (0 == GetProcessAffinityMask(GetCurrentProcess(),
-                                    &processAffinityMask,
-                                    &systemAffinityMask)) {
-        return false;
-    }
-
-    DWORD_PTR threadAffinityMask = 1 << nth_set_bit(processor, processAffinityMask);
-    return 0 != SetThreadAffinityMask(winData->fHandle, threadAffinityMask);
-}