Move Google3-specific stack limitation logic to template classes. Remove #ifdefs in other files.

src/gpu/gl/GrGLGpu.cpp

Index: src/gpu/gl/GrGLGpu.cpp
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 3b7ccd32417718a14367399125d5247981f84978..8a0d7282cc4ae66b13e80f8d3e429ee55f331f55 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -857,12 +857,7 @@ bool GrGLGpu::uploadTexData(const GrSurfaceDesc& desc,
     size_t trimRowBytes = width * bpp;
 
     // in case we need a temporary, trimmed copy of the src pixels
-#if defined(GOOGLE3)
-    // Stack frame size is limited in GOOGLE3.
-    SkAutoSMalloc<64 * 128> tempStorage;
-#else
     SkAutoSMalloc<128 * 128> tempStorage;
-#endif
 
     // Internal format comes from the texture desc.
     GrGLenum internalFormat;