Use only one GL context per process, share chaches.

Change-Id: Ieabaa25338d2f4b8d4fd90e7401ad6e7452eae11
diff --git a/libs/hwui/GradientCache.cpp b/libs/hwui/GradientCache.cpp
index 59fa0a7..58920bd 100644
--- a/libs/hwui/GradientCache.cpp
+++ b/libs/hwui/GradientCache.cpp
@@ -22,6 +22,7 @@
 #include <SkGradientShader.h>
 
 #include "GradientCache.h"
+#include "Properties.h"
 
 namespace android {
 namespace uirenderer {
@@ -30,6 +31,20 @@
 // Constructors/destructor
 ///////////////////////////////////////////////////////////////////////////////
 
+GradientCache::GradientCache():
+        mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity),
+        mSize(0), mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) {
+    char property[PROPERTY_VALUE_MAX];
+    if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, NULL) > 0) {
+        LOGD("  Setting gradient cache size to %sMB", property);
+        setMaxSize(MB(atof(property)));
+    } else {
+        LOGD("  Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE);
+    }
+
+    mCache.setOnEntryRemovedListener(this);
+}
+
 GradientCache::GradientCache(uint32_t maxByteSize):
         mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity),
         mSize(0), mMaxSize(maxByteSize) {