Force all Intel GPUs to use draws instead of clears on Macs

Bug: 773107
Change-Id: I931d9623a359e264dfee35a2ea6c591cdf83a052
Reviewed-on: https://skia-review.googlesource.com/58580
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

src/gpu/gl/GrGLCaps.cpp

@@ -578,7 +578,9 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
 #ifdef SK_BUILD_FOR_MAC
     // crbug.com/768134 - On MacBook Pros, the Intel Iris Pro doesn't always perform
     // full screen clears
-    if (kIntelIrisPro_GrGLRenderer == ctxInfo.renderer()) {
+    // crbug.com/773107 - On MacBook Pros, a wide range of Intel GPUs don't always
+    // perform full screen clears.
+    if (kIntel_GrGLVendor == ctxInfo.vendor()) {
         fUseDrawInsteadOfClear = true;
     }
 #endif